This year’s conference starts in two days, in Pordenone, northern Italy – and we’re getting ready. It’s not too late to register and join us!

The Document Foundation is the non-profit organisation that coordinates the LibreOffice community. Anyone who contributes to the project can apply to become a member of the foundation, and join the over 200 existing members. We’ve also partnered with TUXEDO, a laptop vendor based in Germany that offers Linux-powered machines, to offer TDF members a 3% discount. The laptops include LibreOffice, of course, and have the option of a special LibreOffice key.

Annika Litzel from TUXEDO says:

We’re very excited to continue our collaboration with The Document Foundation and LibreOffice! As a manufacturer that has always been committed to Linux and Open Source, supporting projects and communities that help build a free and independent digital ecosystem is especially important to us. With this continued partnership, we want to provide a direct benefit to TDF members while strengthening our shared vision: powerful hardware, Linux, and free software should work seamlessly together – without unnecessary dependencies and with a strong focus on privacy and digital sovereignty. A big thank you to The Document Foundation for their continued trust and for this great collaboration!

Find out more about TUXEDO here, and apply to become a member of TDF on this page.

Tell us what you’re doing in the LibreOffice project, and other free and open source (FOSS) projects!

I’m a member of the Brazilian documentation team, officially since 2017. I spent most of that time working on translation and localisation, but lately I’ve been working more on web design, like the Bookshelf project and the online help update. I’d also worked on translation and localisation in other projects before, like the XOOPS CMS and the Fedora project, where I started as an ambassador back in 2008.

What are your professional activities and how do they relate to FOSS?

I’m a federal public servant in Brazil, and I’ve taken part in some initiatives to use free software in government, but I don’t make decisions at that level, so there’s little I can do to push the adoption of free software where I work. My personal use and choice of tools leans toward free software whenever there’s a choice, but there aren’t many choices.

What have you contributed recently in the LibreOffice project?

The online help update has been getting some attention, and I’ve been able to contribute to modernising it and using standards that are more accessible and responsive, along with a more modern look that has more appeal. We have a weekly meeting in the Brazilian community where we keep up with the team’s efforts, propose new ideas, and adopt workflows that help the project.

What is contributing like (what bits are easy or hard, with the tools and processes in the project)?

One thing that took me a while was getting past the initial barrier to contributing bug reports or submitting code via Git — every organisation has its own way of doing things, and some have more hurdles than others. Once you get past that initial barrier, things get a lot easier.

How do you interact with other members of the LibreOffice community (especially the Brazilian one)?

Our weekly meeting helps a lot with that — we talk regularly, and that goes a long way toward solving problems and bringing members closer together. We’ve had some in-person meetings at events like the conference held in Brasília in 2022 and some hackathons, and we plan to have more of these gatherings, which tend to be quite productive and enjoyable too.

What is your impression of LibreOffice as a product? Do you see it used in Brazil, in areas of the public and private sectors?

Personally, I’ve been using the suite since it was called StarOffice, when it was pretty much the only really useful office suite for Linux at the turn of the millennium. Then came OpenOffice, which in Brazil ended up being named BrOffice, and finally LibreOffice.

My honest opinion is that it’s the most complete office suite available on the market, and I’m glad it’s an open source tool, which is my preference for any software. These days I use office suites a lot less because of the tasks I usually do on the computer — it’s rarely necessary — but I still keep up-to-date, even through translating the help, which shows new features in LibreOffice to anyone who pays attention.

Join the LibreOffice community here!

We’re gearing up for the LibreOffice Conference 2026 next week in Pordenone, northern Italy – but there are more events in the pipeline too.

At the Open Source Conference Luxembourg 2026, which takes place on October 7, there will be two talks from Florian Effenberger, Executive Director at The Document Foundation, around the topics of LibreOffice:

• Why free software and digital sovereignty are made for one another
• The Cyber Resilience Act and Open Source: where do we stand? LibreOffice’s conformity journey as a working example

Keep an eye on the conference website for more details and videos of the talks.

Berlin, 4 September 2026 – The Document Foundation today announced the release of LibreOffice 26.2.6, the sixth maintenance update to the LibreOffice 26.2 branch. Building on the major feature release published on February 4, 2026, this update delivers targeted bug fixes and stability improvements contributed by a global community of developers and QA engineers.

LibreOffice 26.2.6 is available for immediate download at libreoffice.org/download for Windows, macOS, and Linux.

List of fixes in RC1: Releases/26.2.6/RC1. List of fixes in RC2: Releases/26.2.6/RC2.

LibreOffice users, free software advocates and community members can support The Document Foundation and the LibreOffice project with a donation at libreoffice.org/donate.

Q&A — LibreOffice 26.2.6

Q: What is LibreOffice 26.2.6?

LibreOffice 26.2.6 is the sixth maintenance update to the LibreOffice 26.2 branch, released by The Document Foundation on 4 September 2026. It delivers targeted bug fixes and stability improvements over the major feature release published on 4 February 2026.

Q: When was LibreOffice 26.2.6 released?

4 September 2026.

Q: Where can I download LibreOffice 26.2.6?

From https://www.libreoffice.org/download/, for Windows, macOS, and Linux.

Q: Which operating systems does LibreOffice 26.2.6 support?

Windows, macOS, and Linux.

Q: What is the next version of LibreOffice after 26.2.6?

The Document Foundation will announce LibreOffice 26.8.1 on 17 September 2026, and LibreOffice 26.2.7 on 29 October 2026.

Q: Where can I find the full list of fixes in LibreOffice 26.2.6?

RC1: https://wiki.documentfoundation.org/Releases/26.2.6/RC1 — RC2: https://wiki.documentfoundation.org/Releases/26.2.6/RC2

Q: Who develops LibreOffice 26.2.6?

A global community of volunteer and professional developers and QA engineers, coordinated by The Document Foundation, the Berlin-based non-profit behind LibreOffice.

Q: How much does LibreOffice 26.2.6 cost?

Nothing — LibreOffice is free and open source software. Users and advocates can support the project with a donation at https://www.libreoffice.org/donate.

One of the comments on the announcement of LibreOffice 26.8 was a simple question: “So, no AI is now a feature?”

LibreOffice does not reject artificial intelligence out of hand, but an office suite used by tens of millions of people – in schools, hospitals, public bodies, law firms and thousands of other organisations – will not add a feature to its default configuration until that feature can be delivered under the conditions defined by the project in accordance with its principles.

User-controlled execution. The user must be able to choose where inference takes place: on the local computer, on an infrastructure directly controlled by the user, or on a service chosen independently by the user. A default setting that silently redirects to a single provider is not a choice.

No content may leave the computer without authorisation. The content of documents is a user’s asset and, in many implementations, is also legally protected material: medical records, case files, tender documents and student data. Transmission must be the result of a user’s decision and not behaviour carried out in the background by the application.

No telemetry of any kind. LibreOffice does not collect usage data, and this must also apply to AI features.

No dependence on a single provider. An integration that only works with a single company’s API is a lock-in mechanism, regardless of how it is described in the release notes. Interfaces should be open and implementable by multiple backends.

No compromises on format. Generated content must be in ODF format, just like any other content, and must retain its structure, styles and semantics. An assistant that generates documents in a proprietary format perpetuates content lock-in.

Entirely optional. It must be installable, removable, and absent from the user interface for those who do not wish to use it, including administrators deploying the software across thousands of workstations who, due to company policy, do not authorise its use.

Where we stand today

In light of this list, there is no integration that meets all the requirements and that could be deployed, enabled by default, and supported throughout the entire lifecycle of a release. This is an assessment of the current state of the technology and the solutions based on it, and not a judgement on the value of the sector.

In the meantime, users who wish to use AI features can install one of the available extensions, which can be found either on the LibreOffice extensions website or distributed independently. Most connect to a locally running model via Ollama, LM Studio or another OpenAI-compatible endpoint, which means the document never leaves the computer.

These are third-party extensions at various stages of maturity, developed and maintained by their respective authors rather than by The Document Foundation. Users and administrators should assess them as they would any third-party component, checking whether a cloud endpoint is configured and what the provider does with the data it receives. The extension mechanism offers AI functionality to those who want it, without any consequences for all other users.

Why our motivations are different

The reason our position differs from that of the dominant suites has almost nothing to do with the technology.

For a company that sells subscriptions, an AI assistant justifies a price increase and strengthens the case for keeping all documents within its own infrastructure. The functionality and the business model reinforce each other, so integration is not only attractive but almost mandatory.

The Document Foundation is a not-for-profit organisation. There are no subscription tiers to protect, no upsells, no data to monetise. This does not make us wiser than others, but it means we can take the time needed to decide whether something is genuinely useful for our users, as we are not driven by quarterly results.

What lies ahead

The criteria we have listed do not amount to a definitive rejection. The AI sector is evolving rapidly; on-premises inference is becoming manageable on standard hardware; and open models are improving much faster than most of us had anticipated. Should an approach emerge that meets all the conditions, we will evaluate it very carefully.

Until then, there will be no AI of any kind in the default installation; extensions will be available for those who wish to integrate AI features, and we will closely monitor where the technology is actually heading.

One week ago, we announced LibreOffice 26.8, our brand new major update. It’s full of new features, and has many improvements to compatibility and performance too. So, what has happened in the week since then? Let’s check out some statistics…

1,031,162 downloads

This is the highest number of downloads in the first week of any LibreOffice release! These are just stats from our official downloads page, of course – many Linux users will have acquired the new release via their distribution’s package repositories.

50,061 views, shares and likes on social media

Combining our Mastodon, Bluesky, X/Twitter (not used so much now) and Facebook posts about the announcement, and all the likes, shares, views and comments, we get over 50,000. Thanks to everyone who spread the word on social media!

20,918 video views

Our “LibreOffice 26.8 – New Features” video (shown below), has subtitle translations in 32 languages, thanks to our worldwide community, who localised the video on this page. (The video is also available on PeerTube.)

Many thanks to our worldwide community of volunteers, and certified developers, for all their work on this release

Here’s our summary of updates, events and activities in the LibreOffice project in the last four weeks – click the links to learn more…

• We released LibreOffice 26.8, our latest major update, with tabbed UI improvements, professional typography, deeper support for the world’s writing systems, and no built-in artificial intelligence.

• To accompany the release, we made a video showcasing some of the user-facing new features – with subtitle translations in 25 languages, thanks to our worldwide community! (The video is also available on PeerTube.)

• Meanwhile, the Austrian Military (Bundesheer) has moved 16,000 PCs from Microsoft Office to LibreOffice – and we talked to the people behind the migration, to find out how they did it. Check out part 1 and part 2 of the interview.

• Then we talked to Karl-Heinz Gruner from the German-speaking LibreOffice community about his activities in the project.

• Extensions add extra features to LibreOffice, and we talked to Bora Yarkın about a new one which lets you control a LibreOffice Impress presentation from your phone or any other device with a modern web browser.

• In the middle of August, the schedule for the LibreOffice Conference 2026 went online. If you can make it, we look forward to seeing you there

• Then we did another Community Member Monday interview, this time talking to Aleksi Kallio about his work on fixing bugs in LibreOffice.

• There’s a lot of talk about “Digital Sovereignty” – but what does that actually mean? One vital part is an open document platform – like ODF.

• LibreOffice is a worldwide project made up of hundreds of people: volunteers, developers at ecosystem companies, and the 18-person team at The Document Foundation (the non-profit entity that coordinates the project and community). What has the team been working on recently? Check this post to find out.

• LibreOffice has a few user interface options, and none are forced on the user. We explored this topic more in a post called There Is No “Best” Interface, Only the Right Fit.

• How is LibreOffice funded? The vast majority of funding comes in the form of donations – mostly from end-users, but also occasionally from companies and organisations that use LibreOffice.

• Finally, we wrapped up August with another Community Member Monday, talking to Rohan Singh about his macOS-related development work.

Like what we do? Support LibreOffice with a donation – or join our community and help to make LibreOffice even better! Also keep in touch – follow us on Mastodon, Bluesky, Reddit and Facebook.

On August 26 we released LibreOffice 26.8. Here’s a video highlighting some of the user-facing new features and improvements, with subtitle translations in over 25 languages, thanks to our worldwide community! (Note: the video is also available on PeerTube.)

LibreOffice 26.8 is the first version to display a donation banner in the Launch Centre. This document explains the reasons behind this decision and provides information on The Document Foundation’s sustainability model.

All figures are taken from the financial statements of The Document Foundation Stiftung, based in Berlin, and have been published on the website for every year of the foundation’s existence since its registration.

TDF revenue in 2025

Total revenue amounted to approximately 2.2 million euros.

Of this, over 90 per cent comes from donations, and the remainder almost entirely from the sale of LibreOffice via Microsoft and Apple’s online stores, where the price is set to cover the costs of maintaining the applications on those platforms.

It is worth noting that the same versions available on Microsoft’s and Apple’s online stores can be downloaded freely – and therefore free of charge – from the LibreOffice website.

Over 90 per cent of donations come from private individuals, and less than 10 per cent from public bodies and companies. Therefore, although the suite is widely used by companies and public bodies, it is funded almost entirely by private individuals who contribute small sums according to their means.

How much did TDF spend in 2025

Total expenditure amounted to approximately 1.5 million euros.

Seventy-five per cent of this expenditure was allocated to staff salaries and social security contributions, as well as consultancy contracts. Today, the foundation employs 18 people, 11 of whom have contributed to software development or other related activities, such as quality control.

It is worth emphasising this proportion clearly. Three-quarters of the TDF’s expenditure goes on staff, and the largest share is accounted for by development work, community building and education on the themes of software freedom, open standards and digital sovereignty.

Donations are channelled into constructive activities, rather than administrative costs.

In the past, a significant proportion of development work was awarded to companies that submitted the best bid in response to a tender, but this strategy has changed, and it was decided to bring development expertise in-house so as to steer the software’s evolution and share knowledge with the community.

The surplus in 2025

The surplus is not left unused but is reinvested in the growth already underway: three developers were hired during 2026 and two more will be hired shortly. In addition, various marketing and community development projects are funded from the same source.

The foundation’s expenditure does not follow a uniform pattern relative to its income. The recruitment process takes months, and if income is received before new staff are hired, a surplus will arise that represents planned work rather than unspent money.

TDF also maintains reserves, with the aim of covering at least one year’s operating costs. This figure, of course, increases year on year.

For an organisation with a single predominant source of income, this represents a minimum target. Indeed, a foundation that employs 18 people and supports a community of thousands has obligations towards them that cannot be suspended if income from donations declines.

Why this banner, and why now?

TDF is in good financial health. However, when compared with similar projects, it is significantly underfunded.

Thunderbird, an open-source email client supported almost entirely by donations, received $10.3 million in 2024 – 19 per cent more than the previous year – from over 335,000 individual donors. The Wikimedia Foundation operates on an even larger scale.

LibreOffice has a user base comparable to or larger than that of Thunderbird and a more extensive source code, covering six applications, dozens of file formats and 120 languages, whilst generating revenue amounting to around one-fifth of Thunderbird’s.

The gap is significant because the market has changed. Most people compare LibreOffice with Microsoft 365, and this creates expectations regarding availability on the web, in the cloud and on mobile devices that a desktop-focused development effort is unable to meet.

TDF has published a roadmap for web, cloud and mobile development. Delivering this within a timeframe that keeps pace with market developments requires greater development capacity than current revenue can support.

The banner serves to partially bridge this gap. It appears in the Start Centre – the screen that appears when the suite is launched without any documents open – and is displayed periodically, for example at monthly intervals or following an update. The banner links to the donations page and does not appear anywhere else in the software.

What the banner is not

LibreOffice contains no adverts, does not collect telemetry data and does not require any account, subscription or activation. No features are reserved for paying users. The suite does not transmit documents to a remote service and does not require network access to function. LibreOffice 26.8 contains no generative artificial intelligence features.

Maintaining each of these features incurs costs, as each represents a source of revenue that the foundation has chosen not to exploit.

Advertising-supported software is funded by attention; subscription-based software is funded by the ability to revoke access; and data-driven software is funded by surveillance. TDF has ruled out all three of these options, leaving only the possibility of donations.

The problem with companies

The imbalance between individual and corporate donations is a specific problem that the foundation would like to rectify.

Companies and public bodies deploy LibreOffice on a large scale — in some cases on tens of thousands of computers — and derive a direct commercial benefit from it. Under the terms of the Mozilla Public Licence v2, they have the right to do so, and no one intends to revoke this right.

Unfortunately, very few of these organisations contribute financially to the project. The result is that private individuals are, in effect, subsidising the infrastructure costs of organisations that have considerably greater resources than they do.

Organisations that rely on LibreOffice have at least three ways of supporting it. They can make a donation to The Document Foundation, or purchase an enterprise version from a company within the LibreOffice ecosystem that offers a Service Level Agreement (SLA), professional support and security updates for a period of between three and five years, or pay a company or an individual to develop specific features tailored to their needs.

All these methods support the software, but none is used on a scale that is even remotely comparable to what one might expect given the widespread adoption of the product.

In fact, during 2026, the average monthly number of LibreOffice downloads approached one million, and there were nearly 600 million visits to the website from which updates are downloaded. Based on these two figures, even a very conservative estimate puts the number of LibreOffice users worldwide at over 100 million.

Digital sovereignty is usually discussed in terms of where servers are located and which company holds the contract. Both matter less than the format in which documents are written.

A document is not a piece of paper

The habit of thinking of a digital document as a sheet of paper is understandable and wrong. A sheet of paper carries its own content. Anyone who can read the language can read the page, with no equipment, no permission and no intermediary. A digital document carries no content at all until software interprets it. The file is a set of instructions, and what appears on screen is the result of a program executing those instructions. Change the program and the result may change with it.

This is why documents produced in one application so often look wrong in another: bullet points shift, tables lose their proportions, headings render differently. The content is present. The document, strictly speaking, is not.

The format is the specification that tells software how to perform that interpretation. Whoever controls the format therefore controls what the document means, how faithfully it can be reproduced, and for how long.

What makes a format open

Openness is not a marketing description. It has established criteria, set out in instruments such as the Open Definition and the European Interoperability Framework, and used by public administrations to assess formats for procurement. Four conditions matter most.

The specification must be published in full and freely available. Nobody should need a licence, a fee or a patent settlement to implement it. The format must be usable by anyone for any purpose, without discrimination between users, applications or business models. And it must be governed by a body independent of any single vendor, so that future versions are decided in public rather than in a company’s product roadmap.

These conditions exist for a practical reason. They are what guarantees that a document written today can still be opened in thirty years by software nobody has yet written.

ODF meets these conditions

The Open Document Format was developed in the open under OASIS, the international standards consortium, and became an OASIS standard in 2005. It cleared its Draft International Standard ballot at ISO/IEC JTC 1/SC 34 in May 2006 with unanimous approval and was published as ISO/IEC 26300 that November. The specification is public, royalty-free, versioned, and maintained by a technical committee whose work is a matter of record. Version 1.4 was approved by OASIS in December 2025.

ODF is not the LibreOffice format. It is implemented by a range of applications from different suppliers, and any developer may implement it without asking anyone. LibreOffice uses it natively, which is a consequence of the format’s openness rather than a claim of ownership over it.

OOXML does not

OOXML, the format underlying DOCX, XLSX and PPTX files, carries an ISO number. It was granted one in 2008 through a fast-track procedure whose conduct is now part of the documented history of standards governance.

The number has not produced the effects a standard is meant to produce. The specification runs to several thousand pages, which discourages implementation. It exists in two conformance classes: a Strict variant, which other developers could reasonably support, and a Transitional variant, which preserves legacy behaviours and is what Microsoft Office writes by default. The variant in daily use by hundreds of millions of people is therefore the one that only its originator implements completely. The cleaner variant that competitors could support is largely unused, and has even disappeared from some versions.

A specification that a single implementation alone can satisfy is, in functional terms, a proprietary format with a standardisation certificate attached. This is not an accusation of bad faith. It is a description of what the format does regardless of anyone’s intentions, and it is the reason the distinction is structural rather than moral.

Why this decision comes first

An organisation that adopts a European cloud provider, negotiates strong contractual protections and hosts everything within its own jurisdiction has achieved nothing for sovereignty if its documents remain in a format only one foreign supplier can read correctly. Server location, hosting jurisdiction and procurement clauses are all downstream of the format decision. An organisation that cannot open its own archives without a supplier’s permission is not sovereign over them, wherever those archives happen to be stored.

The exposure grows with time. An individual with a distorted layout has an inconvenience. A ministry holding two decades of legislative drafts, land registries and court records in a format it cannot independently interpret has delegated custody of the public record to a private company, and cannot withdraw that delegation without converting everything it owns.

Who has already acted

Germany’s Deutschland-Stack, the federal framework for sovereign public digital infrastructure, names ODF and PDF/UA as the mandated document formats, to the exclusion of proprietary alternatives. The IT Planning Council, the body through which the federal government and the Länder coordinate public administration information technology, has committed to ODF. NATO and the European Commission have mandated it.

The decision is not a European one. Taiwan adopted ODF as a national standard in 2009 and has required it as the government’s document format since January 2015, a policy its Ministry of Digital Affairs describes in terms of software equality, digital sovereignty and sustainable development. Brazil has required federal executive bodies to follow the e-PING interoperability framework, built on open standards, since 2005. Public administrations on almost every continent have taken comparable decisions over the past two decades.

What has changed recently is the reasoning. The case for moving away from proprietary office software was once made primarily as a cost saving. It is now made as the preservation of independence, meaning the ability of a public body to act without asking permission from a foreign supplier. Several of the migrations announced in the past year were presented in exactly those terms, with the cost argument set aside. At least one European defence organisation has stated that its decision was not about money at all.

The alternative to lock-in already exists, is mature, is an international standard, and is a legal requirement in several European jurisdictions.

Further reading

Start here

• What is Digital Sovereignty
• There is no digital sovereignty without ODF
• The characteristics of a truly open document standard format

Format comparison and lock-in

• ODF is the future, OOXML is the past
• Why ODF and not OOXML
• How proprietary formats have become Microsoft’s main tool for lock-in
• Document formats: a mystery to many
• The non-technical dependency layers: the Calendar and the Invoice

Policy and adoption

• Twenty years on, ODF is still the only open standard for office documents, and the only one governments can trust
• Germany’s sovereign digital stack mandates ODF
• Policy and digital sovereignty – TDF Annual Report 2025
• Euro-Office: sovereign in name only, or in reality too?

Technical reference

• What is the Open Document Format (ODF)?
• A technical dive into ODF
• Understanding ODF file types: .odt, .ods, .odp and beyond
• What’s new in ODF 1.3 and 1.4
• ODF v1.4 approved as an OASIS standard

Berlin, 26 August 2026 – The Document Foundation today announced the availability of LibreOffice 26.8, the new major release of the free and open source office suite, for Windows, macOS and Linux. Development began in December 2025, and the release consolidates the work of 206 contributors, of whom 155 are volunteers.

LibreOffice 26.8 concentrates on three areas: the typographic quality of what the suite produces, the range of writing systems it handles correctly, and the fidelity with which documents survive exchange with other office suites.

Writing systems

The largest single body of work in this release addresses bidirectional and complex text. Writer now detects paragraph direction automatically when documents or plain text are opened or pasted. Line wrapping places end-of-line spaces according to the direction of the paragraph rather than that of the adjacent characters. Object resize handles behave correctly in right-to-left and vertical CJK documents. Bidirectional control characters are now visible alongside other formatting marks. In Calc, typing right-to-left text into an empty cell sets the direction of that cell automatically.

Alignment semantics have been revised accordingly: new documents default to start alignment rather than left, and changing paragraph direction no longer mirrors explicitly left- or right-aligned paragraphs.

Math has gained named functions and operators for the N’Ko and Adlam scripts, used for the Manding languages of West Africa and for Fulani, together with left-pointing vectors and harpoons for right-to-left formulas. The CJK text grid option has been renamed to reflect what it actually does, namely enable the genkō yōshi manuscript grid. Font names recorded in languages other than the interface language are now resolved, so documents authored elsewhere display in the typefaces their authors chose.

None of this work has a commercial market. It was done anyway, because a foundation does not have to ask whether a language pays for itself before deciding to support it.

Typography

Writer introduces the Paragraph Composer, a text layout algorithm that balances word spacing across consecutive lines instead of optimising each line in isolation. The single-line, greedy approach used by word processors has been standard since the technology existed, and produces justified text that alternates between crowded and sparse lines wherever long words fall near a break.

OpenType font variations are now natively supported, allowing variable fonts to be used as designed, including axes that adjust letterform contrast and proportion to the size at which text is set.

Baseline grid alignment now works correctly for text inside frames, and the grid itself can be displayed while editing, with a configurable colour.

Document exchange

LibreOffice Chart provides basic round-trip support for the newer chart types that Microsoft Office writes into OOXML files: box-and-whisker, funnel, Pareto, sunburst, treemap and waterfall. These charts cannot yet be rendered or edited. LibreOffice displays a message identifying the unsupported type and preserves the underlying definition, so that a file opened and saved in LibreOffice returns to its originating application intact. Region map charts carry extensive geographic data that is not preserved; the chart type survives the round trip but little of its content does.

The distinction matters. A specification extended unilaterally by a single implementer is a moving target for every other implementer. Preserving what cannot yet be rendered is the discipline that keeps a document usable beyond the lifetime of the application that created it.

Calc improves the handling of line breaks in referenced cells in XLSX files, and form control elements in XLSX documents now appear in the Navigator.

Spreadsheets

Calc adds Calculated Fields to pivot tables. Data validity can now silently reject invalid entries, restoring behaviour available before version 24.2. Cell styles support relative font sizes. A Shuffle command randomises the order of cells in a range. The border toolbar button remembers and reapplies the most recently used style.

Presentations and drawings

Impress and Draw support multiple page sizes within a single document. Impress adds presentation sections for organising slides into named groups, displays custom slide names beside slide numbers in the panel, and can convert numbered lists to bulleted ones. Several embedded templates are now supplied in both 16:9 and 4:3 ratios, so that background artwork is no longer stretched when the ratio changes. In Draw, the functions of the mouse wheel can be swapped, making zoom the default action.

User interface

The Notebookbar now carries a distinct background colour for each application, so that Writer, Calc, Impress and Draw can be told apart at a glance. Its tabs have category labels and can be scrolled with the mouse wheel or touchpad. Changes to application theme colours no longer require a restart, and theme colours are reachable from the Notebookbar in Impress.

The list of styles is now consistent across the Notebookbar, the Formatting toolbar and the sidebar, and each entry is shown as a preview of the style itself. Style dialogues allow individual properties to be reset to those of the parent style. Paper sizes from A0 to B3 have been added to page settings. Custom dictionaries have gained a search filter, the Hyperlink dialogue can strip query strings from addresses, and resizable dialogues on Windows now have a maximise button. On macOS, the Emoji & Symbols, Dictation and AutoFill menu items are available.

Accessibility

Writer tables now report row and column index information as specified in ARIA, improving how screen readers convey table structure. The special character selector is fully navigable by keyboard.

Databases and automation

Base preserves SQL comments when a query is switched to Design View, and supports filtering on date, time and timestamp columns with the embedded Firebird database.

Python scripts can be created and edited directly from the Macro manager without installing an extension, and can instantiate UNO services through constructors rather than string identifiers. The ScriptForge libraries add a typed input dialogue, functional map, filter and reduce operations on Basic arrays, and a default named pipe that allows the same script to run unchanged inside LibreOffice or against it as a client.

Elsewhere in the suite

• Keyboard shortcuts can be assigned to an individual document, so a shortcut can invoke a style that exists only in one template.
• Writer opens very large documents containing images significantly faster.
• A Draft view hides headers, footers and margins for distraction-free work.
• The Quick Find sidebar searches through comments.
• Table styles in Writer and Calc can be edited, and their internal representation has been converted from a binary format to XML.
• Application theme colour changes no longer require a restart.
• Additional paper sizes from A0 to B3 are available in page settings.
• The style list is now consistent across the Notebookbar, the Formatting toolbar and the sidebar.
• Automated testing now uses VeraPDF to validate PDF output.

No artificial intelligence

LibreOffice 26.8 contains no generative AI features. Documents are not transmitted to remote services for processing, and no component of the suite requires network access to function. This is a deliberate position. Any organisation handling confidential, legally privileged or personal data needs to know where that data goes, and the only assurance that survives an audit is that it does not leave the machine.

How LibreOffice is funded

LibreOffice 26.8 is the first release to display a donation banner in the Start Centre, the screen shown when the suite is launched without opening a document. The banner is shown periodically rather than at every launch, for instance at monthly intervals or after a successful update. It links to the donation page and appears nowhere else in the software.

LibreOffice carries no advertising, no telemetry, no subscription, no account requirement, and no feature withheld behind payment. It is released under the Mozilla Public License v2 and can be deployed without restriction by individuals, companies, schools and public administrations. Development is funded by donations to The Document Foundation and by the companies of the LibreOffice ecosystem. The banner exists because software used by tens of millions of people is not free to maintain, and because every alternative route to sustainability would cost users something they currently have.

Changes users should know about

The Gentium Basic and Gentium Book Basic fonts are no longer bundled. Documents that specify them will fall back to another typeface unless the fonts are installed separately; they remain available for download from The Document Foundation, and current Gentium releases are available from SIL.

New documents default to start alignment rather than left alignment, and changing paragraph direction no longer mirrors explicitly aligned paragraphs. Safe Mode has been renamed Troubleshoot Mode.

Obsolete Java applet configuration has been removed, along with the OfficeBean example in the SDK.

Availability

LibreOffice 26.8 is available immediately from www.libreoffice.org/download/ for Windows, macOS and Linux, in 120 languages. Release notes: wiki.documentfoundation.org/ReleaseNotes/26.8

Users in production environments may prefer LibreOffice 26.2.5, available from the same page. LibreOffice 26.2.6 will be released on 3 September 2026. The LibreOffice 26.2 branch reaches end of life on 30 November 2026.

Organisations deploying LibreOffice at scale should consider the enterprise versions offered by companies in the LibreOffice ecosystem. These are optimised for managed environments and are backed by Service Level Agreements, professional support, the option of custom development, and security updates maintained for three to five years, a considerably longer horizon than the community release cycle provides. Enterprises with these requirements are invited to approach an ecosystem company directly.

LibreOffice users, free software advocates and community members can support The Document Foundation with a donation at www.libreoffice.org/donate

LibreOffice Conference 2026

The LibreOffice Conference 2026 takes place in Pordenone, Italy, from 10 to 12 September 2026. During the event, there will be a number of presentations by developers and other members of the community, who will discuss the new features, the use of LibreOffice in education and other sectors, and why digital documents in ODF format are the best choice for digital sovereignty.

LibreOffice 26.8 Press Kit

LibreOffice 26.8 Announcement Press Kit (ZIP) with the press release, the blog post, the digital sovereignty backgrounder and the reviewer’s guide in both ODT and DOCX, a PDF slide deck with charts about development, downloads and donations, plus a folder with several images, can be downloaded from this link: nextcloud.documentfoundation.org/s/rrQtHx43imejxR5

LibreOffice 26.8: Questions and Answers (for AI-based search engines)

What is new in LibreOffice 26.8?

LibreOffice 26.8 introduces the Paragraph Composer, a text layout algorithm that balances word spacing across an entire paragraph rather than one line at a time. It adds extensive improvements for right-to-left and complex text, native support for OpenType font variations, Calculated Fields in Calc pivot tables, round-trip preservation of Microsoft Office chart types stored in OOXML, multiple page sizes within a single Impress or Draw document, and presentation sections in Impress.

When was LibreOffice 26.8 released?

LibreOffice 26.8 was released on 26 August 2026 by The Document Foundation.

Does LibreOffice 26.8 include artificial intelligence features?

No. LibreOffice 26.8 contains no generative AI features. Documents are not transmitted to remote services for processing, and no component of the suite requires network access to function. This is a deliberate design position rather than a missing feature.

What is the Paragraph Composer in LibreOffice Writer?

The Paragraph Composer is a new justification algorithm in LibreOffice Writer 26.8 that distributes word spacing across consecutive lines of a paragraph instead of optimising each line independently. Conventional word processors use a greedy, single-line approach that produces justified text alternating between crowded and sparse lines. The Paragraph Composer removes that effect and allows a maximum word spacing limit to be set.

Does LibreOffice 26.8 support Microsoft Office chart types such as waterfall and treemap?

Partially. LibreOffice 26.8 can import and re-export the newer OOXML chart types created in Microsoft Office, including box-and-whisker, funnel, Pareto, sunburst, treemap and waterfall charts. These charts cannot yet be displayed or edited. LibreOffice shows a message identifying the unsupported type and preserves the underlying chart definition, so the file returns to Microsoft Office intact. Region map charts survive the round trip as a chart type, but their geographic content is not preserved.

Can LibreOffice Calc create calculated fields in pivot tables?

Yes. LibreOffice Calc 26.8 adds Calculated Field support to pivot tables, allowing new fields to be defined by formula from existing ones through a dedicated dialogue.

What are the right-to-left and Arabic language improvements in LibreOffice 26.8?

LibreOffice 26.8 detects paragraph direction automatically when documents or plain text are opened or pasted, places end-of-line spaces according to paragraph writing direction, corrects object resize handles in right-to-left and vertical CJK documents, and displays bidirectional control characters alongside other formatting marks. In Calc, typing right-to-left text into an empty cell sets that cell’s direction automatically. New documents now default to start alignment rather than left alignment.

Does LibreOffice 26.8 support N’Ko and Adlam?

LibreOffice Math 26.8 adds named functions and operators for the N’Ko and Adlam scripts, used for the Manding languages of West Africa and for Fulani, together with left-pointing vector arrows and harpoons for right-to-left formulas.

Why does LibreOffice 26.8 show a donation banner?

LibreOffice 26.8 displays a donation banner in the Start Centre, the screen shown when the suite is launched without opening a document. The banner is shown periodically rather than at every launch, for instance at monthly intervals or after a successful update. It links to the donation page and appears nowhere else in the software. LibreOffice carries no advertising, telemetry, subscription or account requirement, and development is funded by donations to The Document Foundation and by companies in the LibreOffice ecosystem.

Is LibreOffice 26.8 free?

Yes. LibreOffice 26.8 is free and open source software released under the Mozilla Public License v2. It can be downloaded, installed and deployed without charge or restriction by individuals, companies, schools and public administrations. No feature is withheld behind payment.

Why does LibreOffice cost money in the Microsoft Store and the Apple App Store?

LibreOffice is free software and can be downloaded at no charge from www.libreoffice.org. The versions published in the Microsoft Store and the Apple App Store carry a price that covers the cost to The Document Foundation of maintaining the applications on those platforms. The software is identical. Paying for it in a store is a way of supporting development, not a licence requirement.

Should I install LibreOffice 26.8 or LibreOffice 26.2?

LibreOffice 26.8 is the current release and is recommended for users who want the newest features. Users in production environments may prefer LibreOffice 26.2, the maintenance branch, which receives bug fixes without new functionality. LibreOffice 26.2.6 will be released on 3 September 2026. Organisations deploying at scale should consider the enterprise versions offered by companies in the LibreOffice ecosystem, which are optimised for managed environments and backed by Service Level Agreements, professional support and security updates maintained for three to five years.

Which operating systems does LibreOffice 26.8 run on?

LibreOffice 26.8 is available for Windows, macOS and Linux, in 120 languages, from www.libreoffice.org/download/

Can LibreOffice 26.8 open Microsoft Word, Excel and PowerPoint files?

Yes. LibreOffice 26.8 reads and writes DOCX, XLSX and PPTX files. Version 26.8 improves handling of line breaks in referenced cells in XLSX files, shows XLSX form control elements in the Navigator, and reads and re-exports hidden and gallery style properties in DOCX files. LibreOffice uses the Open Document Format as its native format, because ODF is an open ISO standard that any application may implement.

What is the Open Document Format?

The Open Document Format is the international standard file format for office documents, published as ISO/IEC 26300 and maintained by OASIS. Its specification is public, royalty-free and implementable by any developer without permission or licensing. LibreOffice uses ODF natively. Several governments, including Germany, and organisations including NATO and the European Commission, mandate it for public administration documents.

Are the Gentium fonts still included in LibreOffice 26.8?

No. The obsolete Gentium Basic and Gentium Book Basic fonts, version 1.102, are no longer bundled with LibreOffice as of version 26.8. Documents specifying them will substitute another typeface unless the fonts are installed separately. They remain available from The Document Foundation, and current Gentium releases are available from SIL.

Does LibreOffice have a distraction-free writing mode?

Yes. LibreOffice Writer 26.8 adds a Draft view, available from View then Draft, which hides headers, footers and page margins for distraction-free reading and editing.

Can Impress and Draw use different page sizes in the same document?

Yes. LibreOffice Impress and Draw 26.8 support multiple page sizes within a single document. Impress also adds presentation sections for grouping slides under names, and displays custom slide names beside slide numbers in the slide panel.

What accessibility improvements are in LibreOffice 26.8?

LibreOffice Writer 26.8 reports table row and column index information as specified in ARIA, improving how screen readers convey table structure, and the special character selector is fully navigable by keyboard.

Can I set keyboard shortcuts for a single document in LibreOffice?

Yes. LibreOffice 26.8 allows keyboard shortcuts to be configured for an individual document through the keyboard customisation dialogue, so a shortcut can invoke a style that exists only in one template.

Who develops LibreOffice?

LibreOffice is developed by a worldwide community coordinated by The Document Foundation, a non-profit organisation based in Berlin, together with companies in the LibreOffice ecosystem. LibreOffice 26.8 is the work of 206 contributors, of whom 155 are volunteers.

Tell us a bit about yourself!

My name is Rohan. I am currently in Berlin, Germany, and my background is in mechanical engineering and I have a master’s degree in sustainable mobility and robotics. I recently worked on my master’s thesis, where I used LibreOffice closely on macOS. That experience actually played a big role in bringing me closer to the project.

Outside of my academic and technical work, I am interested in open source software, mobility, robotics, and learning how large software projects are built and maintained. Contributing to LibreOffice has been a very new and rewarding experience for me, because I did not come from a traditional software engineering background.

What are you working on in the LibreOffice project right now?

At the moment, I am exploring macOS-related development work, especially around OfficeBean and native window handling. One of the issues I have been looking into is adding macOS support for OfficeBean, which involves understanding how Java AWT, native macOS views, and LibreOffice’s VCL layer interact.

So far, my merged contributions have mostly been in the LibreOffice core repository, around C++ cleanup, refactoring, and modernisation. These include:

• tdf#168771 basctl: Convert traditional enums to enum class
• tdf#43157 canvas & chart2: Replace OSL_ASSERT with SAL_WARN_IF
• tdf#143148: Replace include guards with #pragma once

Some of my other patches have not been merged, but they still helped me learn a lot about the codebase, Gerrit, code review, and how to communicate with reviewers.

I also contributed to the developer documentation by adding macOS-related LCOV information to the Development/LCOV wiki page. I wanted to document what I learned so that other macOS contributors could have a clearer path when using coverage tools.

Why did you choose to become a TDF member?

I chose to become a TDF member because LibreOffice has personally helped me a lot, especially during my master’s thesis. While using it closely, I noticed bugs and small rough edges, and that made me curious about how such issues are reported and fixed.

After attending the LibreOffice Conference in Budapest, I became much more interested in the community behind the project. I saw how welcoming and serious the community is about open standards, user freedom, and long-term software sustainability.

For me, becoming a TDF member is a way to give back to a project that supported my own academic work. It is also a way to stay connected with the community and keep learning from people who have much more experience in open-source development.

Anything else you plan to do in the future? What does LibreOffice really need?

In the future, I would like to continue improving my understanding of LibreOffice’s core codebase, especially in areas related to C++, macOS, VCL, and developer tooling. I am still learning, so I want to take on tasks step by step and contribute in a way that is useful and maintainable.

I think LibreOffice really benefits from better onboarding paths for new contributors, especially people who are not coming from a pure computer science background. The codebase is large and can feel intimidating at first, so documentation, mentoring, and small well-described tasks are very important.

LibreOffice also needs continued attention on platform-specific issues, including macOS, because many users depend on it every day across different environments. Even small improvements can make a big difference for users.

For me, contributing to LibreOffice has been both a technical learning journey and a way to give back. I really appreciate the patience and support of the community, because it has helped me ask better questions, understand code review better, and gradually become more confident as a contributor.

It has become a commonplace to describe the Microsoft 365 Ribbon as the finest office interface available — the most polished to look at and the most ergonomic to use. The claim is repeated so often that it tends to pass unexamined. It deserves examining, because hidden inside it is an assumption that quietly does most of the work: the idea that there exists a single best interface at all.

A competent design — for one kind of user

Let us begin by granting what is true. The Ribbon is a capable piece of design. It was built to help an occasional or intermediate user discover features by browsing rather than by memorising, and for that user it does its job well. Saying so is not a concession wrung out reluctantly; it is simply accurate, and any honest discussion should start there.

But “well-designed for a particular user” is not the same thing as “best interface,” and treating the two as equivalent is where the reasoning slips. An interface optimised for one persona is, by construction, less suited to the others: the power user who works from the keyboard and resents losing vertical screen space, the migrating user carrying twenty years of muscle memory, the user who depends on assistive technology, the user on a small or low-resolution display. A single fixed layout cannot be best for all of them at once. It can only be best for some, at the expense of the rest.

Ergonomics is a trade-off, not a verdict

The same applies to the ergonomic claim, only more sharply, because ergonomics is something one measures rather than asserts. The research on interface efficiency is consistent on one point: how well an interface performs depends on the task, its frequency, and the expertise of the person doing it. Discoverability and raw throughput pull in opposite directions. An interface that makes features easy to find for a newcomer is rarely the one that lets an expert move fastest, and the reverse is equally true.

So the Ribbon makes a trade. It spends vertical screen space and a measure of expert speed to buy browsability for the less frequent user. That is a perfectly reasonable bargain — for the people it was struck on behalf of. Calling it “the best ergonomics,” though, simply declines to name what was given up to get there. There is no free lunch in interface design; there is only a choice about who pays.

The real question: who decides?

This brings us to the point that actually matters. When a product ships a single interface, it has made the ergonomic decision on the user’s behalf and removed it from their hands. The trade-off still exists — it has merely been settled by someone else, once, for everyone.

LibreOffice takes the opposite path. It offers the traditional menu-and-toolbar layout, the Tabbed interface, Tabbed Compact, the Groupedbar, a Sidebar, and a Single Toolbar mode, and it lets each user choose the one that fits their work, their hardware, and their habits. This is not a substitute for a “real” Ribbon, nor an apology for the lack of one. It is the more mature answer to the ergonomic question, for a simple reason: the only person who can properly weigh these trade-offs is the one actually performing the task. Choice is not the consolation prize. Choice is the point.

What 26.8 changes, and what it does not

LibreOffice 26.8 will bring an improved Tabbed interface — the layout closest in spirit to the Ribbon. It is worth being precise about what this means, because it is easy to misread. The improvement widens the range of good options; it does not narrow it. It is emphatically not an admission that the menu-based interface was lacking, nor a signal that it is on its way out.

The traditional menu-and-toolbar interface remains a fully supported, first-class choice, and it will not be deprecated. An ecosystem that adds options without taking any away is the exact opposite of one that imposes a single layout and asks everyone to adapt. Adding a better Tabbed interface while keeping the classic one intact is not a contradiction. It is the whole philosophy, working as intended.

The same principle, one layer down

This approach to the interface is not an isolated quirk. It is the same principle that governs how LibreOffice treats document formats, and the parallel is worth drawing out, because it reveals a consistent way of thinking about who software is meant to serve.

LibreOffice adopts the open standard, the OpenDocument Format, as its native format — the one it reads and writes by default, without compromise. At the same time it continues, release after release, to improve its support for the proprietary formats, so that users who must exchange files with others are served as well as the technology allows. The standard comes first; support for the proprietary follows, and keeps getting better, because that is what users need.

Set this beside the other approach and the contrast is stark. There, support for the open standard is present but kept deliberately limited — limited by choice, not by capability — while the proprietary format remains the privileged default. One model treats the open standard as the foundation and works continuously to serve the user across every format they encounter. The other treats the standard as a box to be ticked and the user as someone to be kept in place.

It is the same pattern in both cases. On one side, a tool that fits itself to the user — in its interface and in its formats alike. On the other, a user asked to fit themselves to the tool. There is no best interface, only the one that fits; and the software that offers the most well-made ways to fit, rather than a single default decided in advance, is the one that takes the user most seriously.

LibreOffice is a worldwide project made up of hundreds of people: volunteers, developers at ecosystem companies, and the 18-person team at The Document Foundation (the non-profit entity that coordinates the project and community). So, what has the team been working on recently? Here’s a quick summary:

Release Engineering

• Tagged, built, and distributed LibreOffice 26.8.0 Release Candidate 2
• Enabled MAR updates for cross-updates from 25.8.7 and 26.2.4 to 26.2.5
• Reviewed patches
• Tested new Windows build bots in production
• Investigated and fixed incorrect permissions in daily Debian packages

Scripting

• Investigated an extension developer’s issue exporting BASIC macros as an extension
• Identified a debug-build assertion that does not appear to affect release builds
• Added a UI test to help prevent future regressions in macro export

Code and Accessibility

• Discussed proposed accessibility improvements on the LibreOffice accessibility mailing list
• Analyzed and fixed tdf#172831: customized NotebookBar tab names were not localised after upgrading
• Released LibreOffice Viewer for Android 26.2.5 on Google Play, F-Droid, and the Meta Horizon Store
• Discussed tdf#172885, a LibreOffice-specific Qt theme/style. Explored an upstream Qt stylesheet-environment-variable approach, then implemented LibreOffice command-line support for setting the stylesheet
• Posted and reworked the macOS-specific parts of the Qt VCL work
  • Reworked the changes in response to comments, then merged them
• Worked on generalising macOS scaling patch
• Made the Reset button dialog action ID well-known across the codebase

QA

• Announced LibreOffice 26.8 RC1 availability for testing
• Upgraded external libraries:
  • NSS to 3.126
  • libffi to 3.7.1
• Improved automated tests:
  • Factored common code from CppunitTest_sc_swarmsolvertest
  • Added ARRAYTOTEXT function tests as FunctionsTest
• Fixed crashes and warnings:
  • Fixed a null-pointer dereference warning in Writer
  • Fixed a crash in ThemeExport::write
  • Fixed a crash in OutMarkdown_SwTableNode
• Tested and commented on Qt6 style and theming work for tdf#172885
• Completed hiring tasks and code reviews
• Investigated regressions involving CJK font names and the CJK bullets gallery
• Fixed two build/SDK issues:
  • Fixed a build issue with Visual Studio 2026 18.7.0
  • Fixed missing cross-platform .NET binding files in the SDK (tdf#165585)
• Continued work toward resolving headless Windows/fontconfig build issues required for Qt6 on Windows

Mentoring

• Reviewed six substantial patch submissions
• Completed GSoC mentor tasks

Design

• Triaged Bugzilla tickets
• Participated in the weekly UX and ESC meetings
• Published extensions and managed comments
• Supported community growth through the @libodesign social media account
• Completed several design reviews
• Prepared the Base survey
• Contributed patches:
  • tdf#115805: corrected increments in numbering dialogs
  • tdf#172739: harmonized NotebookBar tab order

Documentation

• Updated online Help with fixes for Master, 26.2, and 25.8
• Updated Help pages through bug triage, contributor patch reviews, fixes, and housekeeping
• Contributed Help improvements, including:
  • Adjusted left margins for paragraphs in tables
  • Refactored the AutoCorrect Options page
  • Updated documentation for “To page” anchoring
  • Added “Page Break” to Find & Replace attributes
  • Reverted removal of “Page Style” from Find & Replace attributes
  • Muted localisation processing in selected Python and BASIC code lines
• Supported ongoing community updates to the Guides
• Helped newcomers
• Worked on the Bookshelf project, including sanitising the Impress Guide

Marketing

• Announced and promoted new TDF members and the new marketing position
• Maintained social media activity, updates, and responses
• Coordinated conference logistics and prepared the first conference-program draft
• Drafted sections of the TDF Annual Report 2025
• Updated journalists’ mailing lists and database
• Published blog posts about ODF and maintained the blog
• Monitored donations, downloads, media clippings, and download-support requests
• Managed budget-related activities
• Worked on preparations for LibreOffice 26.8 release

So that’s what the team is working on – and this is all thanks to your donations, which help to pay the team members. But as mentioned, this is just a small part of the LibreOffice project activity – the biggest work is being done by hundreds of other people around the world. Thanks to all of you

When governments and organisations talk about “digital sovereignty,” they usually mean one thing in practice: the ability to choose, control, and if necessary replace the software they depend on — without asking permission from a vendor.

It sounds simple. It rarely is.

Document software sits at the centre of almost every organisation’s operations. Contracts, reports, budgets, policy documents, public communications: they all live in files. And for decades, the format of those files — and therefore the tools required to open, edit, and share them — has been controlled by a single commercial entity. That is not sovereignty. That is dependency with a friendly interface.

LibreOffice Technology exists to make genuine sovereignty possible. Not as a promise, and not as a political statement — but as a technical architecture that removes the dependency by design.

This post explains what LibreOffice Technology actually is, why it is categorically different from a “free alternative to Microsoft Office,” and why it is the only open platform capable of supporting software that is fully compatible with the demands of digital sovereignty. It also reviews what several months of deployments, policy decisions, and one very public debate over what “sovereign” actually means have confirmed about that architecture since we first started making this argument.

Beyond the Application: LibreOffice Technology as a Platform

Most people who encounter LibreOffice encounter it as an application — a word processor, a spreadsheet editor, a presentation tool. That is a reasonable introduction, but it misses what makes LibreOffice Technology significant.

LibreOffice Technology is the underlying platform on which LibreOffice — and a growing number of other products — is built. It is a modular, open-source software framework for creating document applications. It includes rendering engines, import/export filters for dozens of file formats, scripting infrastructure, accessibility layers, and interfaces for integration with operating systems, cloud environments, and enterprise software stacks.

Think of it the way you might think of a general-purpose operating system kernel: the kernel itself is not what users interact with directly, but it is what makes everything else possible — and it is what determines whether the system is genuinely open or merely open-looking.

LibreOffice Technology is governed by The Document Foundation (TDF), a non-profit foundation incorporated under German law. Its source code is publicly available, its governance is transparent, and its development is carried out by a global community of contributors from dozens of countries and organisations — including Collabora, allotropia, Red Hat, and many others.

No single company controls it. No acquisition can change its licence. No pricing decision by a distant board can determine whether your organisation can keep using it next year.

That is what a platform for digital sovereignty looks like.

Open Standards Are Not Optional: The Role of ODF

Sovereignty over software is meaningless if the data is not equally free.

A document format is not just a technical specification. It is a commitment about who can read your files in ten years, which tools can process them today, and whether you are locked into a particular vendor’s upgrade cycle to maintain access to your own information.

LibreOffice Technology is built around the Open Document Format (ODF), an ISO/IEC international standard (ISO/IEC 26300) developed through an open, multi-stakeholder process. ODF defines how text, spreadsheets, presentations, and other document types are stored — in a way that any conforming application can read and write, regardless of who made it or on what platform it runs.

This matters in ways that are easy to underestimate. When a public administration stores its records in ODF, it is not dependent on any vendor to access those records in the future. When a hospital uses ODF for patient documents, it can switch tools without migrating data. When a ministry publishes a policy document in ODF, any citizen with any compliant application — on any operating system — can open it.

Contrast this with proprietary formats that, despite occasional published specifications, remain under the effective control of the companies that defined them. “Open enough” is not the same as open. Earlier this month, we set out a first version of what separates the two: a thirteen-criterion definition of what a genuinely open document format requires, from public specification and royalty-free implementation through to independent governance. That short version is only the opening statement — we originated this framework, and a fuller, more rigorous edition is in development, applying all thirteen criteria in detail to ODF, OOXML Strict, and OOXML Transitional in turn.

LibreOffice Technology’s commitment to ODF is not a preference. It is an architectural principle. The platform is designed around the assumption that the data belongs to the user, not to the software.

The Platform Others Build On

One of the clearest indicators that LibreOffice Technology is a genuine platform — not just a standalone application dressed up in platform language — is the ecosystem of products built on top of it.

Collabora Online, a cloud-native document editing solution deployed by enterprises, governments, and cloud providers across Europe and beyond, is built on LibreOffice Technology. Collabora’s 2025 merger with allotropia — whose engineering team brought deep WebAssembly and vertical-application expertise into the same organisation — is itself an example of how the ecosystem consolidates and grows without ever touching the underlying platform’s governance. Other commercial and community products remain in active development by organisations that have chosen LibreOffice Technology precisely because it provides a stable, open foundation they can build on without acquiring permission from or paying royalties to a gatekeeper.

This ecosystem diversity is itself a form of sovereignty insurance. If one vendor stops supporting a product built on LibreOffice Technology, the platform continues. If a government or organisation builds custom tooling on top of LibreOffice Technology, it owns that investment. If the community of contributors shifts, the codebase remains — licensed under the Mozilla Public License 2.0, which ensures it can never be made proprietary.

A sovereign digital infrastructure is not one built on a single vendor’s promises. It is one built on a platform that multiple independent actors develop, maintain, and depend on. LibreOffice Technology is that platform.

The Euro-Office Test Case: Why Compatibility Is Not Sovereignty

No event tested this argument more directly than the emergence of Euro-Office, the European coalition initiative that surfaced this spring under the digital sovereignty banner.

Our first reaction, when the initiative made its opening announcement, was blunt about the architecture: a European suite built around full compatibility with Microsoft’s OOXML formats does not escape dependency, it relocates it. The hosting moves to Europe. The format — and the vendor who controls its evolution — does not.

Euro-Office’s formal pre-announcement in June moved the conversation forward. It leaned much further into a commitment to open standards, and we welcomed that shift while correcting one detail then circulating in the press: LibreOffice, developed under this Foundation for a decade and a half by a global — and substantially European — community, was never absent from the field Euro-Office proposes to enter. We also set out, plainly, the one destination consistent with the sovereignty the coalition invokes: ODF as its native document format, not merely a supported one.

The distinction is not a technicality. As we laid out in A Standard in Name Only, the version of OOXML every proprietary vendor ships by default is the Transitional conformance class — built to preserve decades of undocumented legacy behaviour from Microsoft Office versions of the 1990s, not the cleaner Strict variant an independent implementer could actually build to. An office suite that treats OOXML Transitional as its working format, however European its servers, is building on a specification only one vendor has ever fully implemented. What Euro-Office does next will show whether the coalition takes the final step from sovereign hosting to sovereign format.

Where Sovereignty Is Not an Abstraction: Real Deployments

Digital sovereignty is sometimes discussed as though it were a future aspiration. For a growing number of organisations, it is a present operational reality — and this year produced the clearest evidence of that yet.

In March, Germany’s Federal Ministry for Digital and State Modernisation folded ODF, alongside PDF/UA, into the Deutschland-Stack, the technical framework that will govern digital infrastructure across every level of German public administration. OOXML did not make the list. “This is not a recommendation or a preference, it is a mandate,” said Florian Effenberger, TDF’s Executive Director, at the time — and as we argued in the days that followed, it is a decision the rest of Europe, and every digital policy advisor reading it, should be studying closely.

Germany is not alone. The Italian Ministry of Defence has spent several years migrating well over 100,000 workstations to LibreOffice under its LibreDifesa programme, reducing dependency on proprietary desktop software and building direct control over its document infrastructure. The French Gendarmerie nationale has pursued the same goal at comparable scale over two decades, moving the substantial majority of its computing estate to open-source software as part of a deliberate strategy to reduce vendor lock-in. And in August, in a two–part interview with the Austrian Bundesheer, we heard directly from the team that has moved 16,000 workstations off Microsoft Office: the decision traced back to a 2020 review of what guarantees existed for running office software without a cloud connection at all. The City of Munich’s long-running open-source initiative — despite its complex political history — remains the clearest illustration that sovereign document infrastructure is both technically achievable and organisationally demanding, at scale, inside a large public administration.

These are not proofs-of-concept. They are operational deployments in organisations for which the ability to control their own software stack is not an ideological preference but a security and continuity requirement.

They also illustrate something important: the question is no longer whether LibreOffice Technology can support enterprise-scale sovereign deployments, or whether governments will choose ODF when the choice is put to them plainly. Germany has already answered both. The question now is how quickly the rest of Europe follows.

Why “No Single Vendor Can Pull the Plug” Matters More Than Ever

In 2011, Oracle donated the OpenOffice.org codebase to the Apache Software Foundation and largely stepped back from development. The product that had been the leading open-source office suite effectively stalled. Development slowed, releases became infrequent, and the community migrated — mostly to LibreOffice, which had been founded in 2010 precisely to create a more independent governance structure.

This episode is instructive. A product can be open-source and still be effectively controlled by a single corporate actor. When that actor’s priorities change, the product suffers.

Much of what we have published this year has been an attempt to make that risk structural rather than anecdotal. The invisible architecture of lock-in traces how dependency on a document’s format cascades into dependency on the rendering engine that displays it and, beneath that, the fonts that give it its final shape — three technical layers, each one obscuring the one beneath it. The Calendar and the Invoice extends the same argument to two layers that are not technical at all: the migration deadline a vendor sets, and the subscription price it charges. Five layers, and what unites all of them is a single absence — the user has no exit.

The Document Foundation was designed with this risk explicitly in mind. TDF’s statutes prevent any single company or individual from controlling the foundation. Its governance model distributes decision-making across an elected board, a membership body, and an engineering steering committee. The LibreOffice Technology codebase cannot be re-licensed, sold, or restricted by any single party.

This is not an accident of history. It is an architectural decision about governance — as important to digital sovereignty as any technical specification.

What Sovereignty Requires of a Platform

Digital sovereignty is not a binary condition, and it is not the same thing as self-sufficiency. As we argued in July, it is not about owning everything — no institution, and certainly no continent, is going to reimplement the entire computing stack from silicon upward. It is about ensuring that nothing essential can be taken away. Different organisations will weigh that differently, but a platform that genuinely enables it must satisfy several non-negotiable criteria:

Open source with a robust licence. The code must be inspectable, modifiable, and redistributable. Not just available — auditable and forkable by any qualified party.

Open standards at the data layer. File formats must be governed by independent standards bodies, not by the platform vendor.

Independent governance. No single commercial entity should be able to make decisions — about licensing, pricing, feature development, or platform direction — that override the interests of the broader community of users and contributors.

An active, diverse contributor base. Sovereignty requires resilience. A platform maintained by a single company is a single point of failure.

Ecosystem depth. Sovereignty at the document layer requires that the platform be capable of supporting the full range of an organisation’s document needs — not just basic editing, but integration with enterprise systems, accessibility compliance, multi-language support, and cloud deployment.

LibreOffice Technology satisfies all of these criteria. We are not aware of another document software platform that does.

Sovereignty Starts Here: The Story So Far

When we first sketched out this argument, we framed it as the opening of a campaign. Several months on — with the Euro-Office debate still very much alive, Germany’s Deutschland-Stack mandate now a matter of public record, and the US CISA’s own guidance on open-source verifiability landing squarely in the same argument — it makes more sense to call it what it has become: an ongoing, evidence-led case, not a one-off pitch.

If you want the fuller version, the pieces above trace most of the argument in detail: what digital sovereignty actually means and doesn’t mean; the layered architecture of lock-in and its non-technical extensions; what separates a genuinely open format from one that merely claims the label; the Euro-Office exchange in both its instalments; and, most concretely, the Austrian Bundesheer’s own account of why and how it moved 16,000 desktops off Microsoft Office. Together with the Deutschland-Stack decision, they are the evidence behind everything argued in this piece.

We are not finished. There are interoperability failures we haven’t yet written about, further national deployments to document as they happen, and — with LibreOffice 26.8 due for release on 26 August — a platform that keeps giving us more to report on. Watch this space for what comes next.

If you are a journalist or analyst covering digital sovereignty, open source, or public-sector technology, we would like to talk. If you are an organisation considering or using LibreOffice Technology and would like to share your experience, we would welcome the conversation. Reach out to our communications team at media@documentfoundation.org.

Digital sovereignty requires infrastructure that is genuinely open. That infrastructure exists. It is called LibreOffice Technology, and — as the months since we first wrote that line have gone on to show — this really is where the story starts.

The Document Foundation is the non-profit organisation behind LibreOffice. It is independent, non-commercial, and governed by its membership community. LibreOffice Technology is the open platform on which LibreOffice and a growing ecosystem of document applications are built.

Tags: digital sovereignty, LibreOffice Technology, open document format, ODF, open source, The Document Foundation, public sector IT, vendor lock-in, document software, Euro-Office, Deutschland-Stack

Further Reading on This Blog

The posts behind the argument above, in the order they were published:

• Dear Europe: Germany has shown the way forward — March 2026
• Euro-Office: sovereign in name only, or in reality too? — April 2026
• A Standard in Name Only: What OOXML Transitional Tells Us About Format Sovereignty — June 2026
• Euro-Office, open standards, and native ODF — June 2026
• The Invisible Architecture of Lock-In: the Layering of Dependencies — June 2026
• The Non-Technical Dependency Layers: the Calendar and the Invoice — July 2026
• What Is Digital Sovereignty — July 2026
• CISA Publishes Open Source Security Guidance: Verifiability Is the Difference — August 2026
• The Characteristics of a Truly Open Document Standard Format — August 2026
• Why and How the Austrian Military Moved to LibreOffice (Part 1) — August 2026
• Why and How the Austrian Military Moved to LibreOffice (Part 2) — August 2026

External Resources

• ISO/IEC 26300:2006 — Open Document Format for Office Applications, the official ISO standard page for ODF.
• Public Money? Public Code!, the Free Software Foundation Europe’s campaign for public code as the default for publicly funded software.
• European Interoperability Framework, the European Commission’s guidance on interoperable digital public services.
• Deutschland-Stack, the German federal government’s official site for its sovereign digital infrastructure programme.

Tell us a bit about yourself!

I’m Aleksi, and I live in Oulu, northern Finland. I graduated this spring with a bachelor’s degree in business information technology, and before that I did a vocational degree in software development. Work-wise, my background is in software engineering: I worked on a secure Android smartphone, mostly fixing operating system bugs.

Outside of that, I’m into retro computing: old machines, old phones, and the software that ran on them. There is a lot to learn from software written back when it could only be shipped on physical media. Every time I sit down with a piece of old software, I notice a detail I want to try building myself: an interesting design decision that makes the UI stand out, or a feature that makes me wonder how on earth it was done.

I also like to hang out at my local hacklab and volunteer at gaming festivals. And of course, I like to work on LibreOffice too. What makes LibreOffice interesting to me is that its codebase has a long history. Reading the code and going through the commits allows me to look back in time and see how the software has evolved over the years.

What are you working on in the LibreOffice project right now?

I’m currently working on smaller code fixes. I pick up bugs from Bugzilla, try to reproduce them, and ultimately submit a patch that fixes the issue. In a codebase the size of LibreOffice one can’t just aimlessly duct tape a solution and hope it works. One has to understand the root cause to be able to look in the right place and understand the effect that the change has on the bigger picture.

Coming from a background of debugging Android, I quite enjoy that part of the work. Also, everyone in the community is genuinely great to work with. Code reviews in particular taught me a lot, when a more experienced developer pointed out something that I’d never have spotted myself.

Why did you choose to become a member of The Document Foundation?

Becoming a member felt like a way of saying that I’m in this for the long term rather than just passing through. Before I started contributing, I was a bit scared of putting code out under my own name. I felt like my code wouldn’t be good enough, and that I could only contribute to open source after decades of development experience.

Boy, was I wrong. Going through the issues thoroughly (the community likes to leave hints in Bugzilla comments), understanding the problem, and submitting the best patch I could manage turned out to be enough. Having a mentor and the community’s support on IRC, where I could ask questions whenever I needed to, helped a lot too.

Anything else you plan to do in the future?

I’m planning to move from smaller fixes towards more interesting bugs (our Bugzilla doesn’t contain any hard issues, only interesting ones). I’m also looking forward to working with other teams. I’ve been interested in quality assurance and documentation lately, so picking up small tasks in those areas to build up knowledge for larger work sounds like fun to me.

What does LibreOffice really need?

This is a tough question. At least in Finland, LibreOffice needs to be offered as a real option in schools. That also means we need more people who know it well enough to teach it.

On a lighter note, we recently watched the Excel World Championships at the hacklab. I’m not sure it’s what LibreOffice actually needs, but it would be great to see people who are seriously proficient with Calc solving problems and competing. In its simplest form, it could be a community competition to see who solves the most brain teasers.

The LibreOffice Conference 2026 will take place in Pordenone, Italy, from September 10 – 12. And now the schedule is online, with:

• 8 conference tracks
• 64 sessions
• 49 speakers

Click here to view the schedule

This is the second part of our interview with the Bundesheer (see here for the first).

At the LibreOffice Conference 2025, you showcased the new LibreOffice features sponsored by the Austrian Armed Forces. How did that come about?

From the very beginning, we clearly recognised the need to further develop LibreOffice. Before finalising our plans, we also examined how we could continue to develop the product. Ultimately, we issued a Europe-wide, open call for proposals to secure both support and development capacity for LibreOffice. The way we selected the product enhancements stemmed in part from this preliminary study, because we had identified specific import capabilities and compatibility requirements.

That’s one major aspect: improving interoperability in line with our needs. The other focus was on improving LibreOffice based on ongoing user feedback and feedback regarding collaboration with external organizations. One example of this was the “Notes” bar in Impress. In the past, users had to edit notes in a separate notes view.

We were told very early on that users wanted to be able to do this directly within the slide editing view. This is a very well-known enhancement that we sponsored, which – I think – works very well. In addition, there are many other details, such as scrolling through presentations with the mouse wheel. Previously, you had to keep switching back and forth to the slide overview view to scroll. Now all of this is possible right from within the slide, which simply makes it easier to use and also increases acceptance because users expect it.

I could list many more extensions. We’re not the only ones contributing a great deal to LibreOffice – we see ourselves as part of the community, and we’re happy when the community uses our contributions and when others contribute their own, which we’re of course very happy to use as well. That’s what makes the project so attractive and successful.

Features and improvements in LibreOffice, sponsored by the Austrian Military (this is a slide from a presentation at the LibreOffice Conference 2025)

Have you also developed external extensions?

We’ve developed extensions for internal use, but there are also several publicly available extensions. One of them integrates our own help page, since we provide targeted help within our internal systems.

On a much larger scale, there’s an extension hosted on GitHub that covers military-tactical symbols. It’s available as open source software, so anyone can use it. This is actually an extension that, although it’s still in “release candidate” status, already works well. The extension is, of course, also suitable for collaboration with other armies. Its functionality is unique. To my knowledge, it’s not available anywhere else.

Do you also use the Open Document Format internally?

Yes – one of the advantages of LibreOffice is that the format is ISO-standardised and truly open. You get the best functionality in LibreOffice when you use ODF. We use ODF throughout. It’s clear that our external partners don’t do this to the same extent. This is where LibreOffice benefits from its ability to handle (read and edit) Office Open XML (OOXML) documents as well.

LibreOffice doesn’t have a built-in email client. How did you handle this issue during the migration?

The Austrian Armed Forces protect the Austrian population; to make this possible, we need, for example, systems that function independently of external parties. We have a large number of systems based on open source solutions and many solutions that are platform-independent. This includes the email system.

Therefore, we didn’t have to replace Outlook or Microsoft Exchange.

At the LibreOffice Conference, you emphasised that the migration was never about saving on licensing costs. The migration was driven by other reasons, correct?

The switch to LibreOffice in the Austrian Armed Forces stems from the necessity that we must be able to function even when nothing else is working. In other words, we cannot rely on public infrastructure. We cannot rely on our data being processed in another data center.

Therefore, the top priority in this transition – unlike 20 years ago, when people very often considered switching to a free office suite or Linux in the workplace for cost reasons – was digital sovereignty.

As for the costs: It was clear to us from the start that we would have to invest in the product in order to gain the additional functionality we needed and to improve interoperability.

Would you like to say a few words about the foundation – that is, The Document Foundation?

Why did we choose LibreOffice in the first place – after all, there are alternative products? LibreOffice isn’t the only solution. First, LibreOffice uses ODF, the open and standardised file format. That’s very important. Second, LibreOffice is truly fully open source software – it’s not a product that just has an open source “core.” There’s no risk of having to pay for variable enterprise features.

And the fact that this is the case is very closely tied to the foundation of LibreOffice, namely The Document Foundation. The way this open source project is implemented and anchored through the foundation – that’s an important guarantee and a key factor in its reliability for us.

Another point is that there is an ecosystem. There are several companies that offer the services we need. Using open source doesn’t just mean using free software – for us, it means we need maintenance, support, the ability to further develop the software, addressing security vulnerabilities, and secure software deployment. All of this comes with a very mature software product that is constantly being developed. That was a key factor in our decision.

What advice would you give to others who are also planning to switch to LibreOffice and open source?

First: There’s a vast amount of information available within the community. It’s important to familiarise yourself with the product. How does LibreOffice work? How does Bugzilla work? Where can I find issues that might not be working but are of interest to me? Where can I find roadmaps for new features, release notes, and so on?

Second: It’s absolutely crucial to properly prepare and fund the resources for a project like this. IT managers have gotten used to rolling out new Office versions without much effort.

However, switching from one office suite to another is actually a massive migration project. This should not be underestimated. It’s not just a matter of installing the software; it requires change management, people to provide support, test the software, and work on new features. It requires the support of service providers. All of this must be prepared in advance. And that’s what sets it apart from previous new office suite releases. You’ll need a project team for this – migration isn’t something you can just do on the side. So, you’ll need proper project organisation and agile change management. How can I provide my users with the necessary knowledge based on their needs? What communication channels do I have to keep my users informed and stay in touch with them?

We – the Austrian Armed Forces – have already received many inquiries about the transition, and we have shared our experiences with numerous organisations. We would be delighted to help build a LibreOffice community for government and enterprise organisations in order to accelerate the collaborative development of LibreOffice.

To that end, I invite you to contact us at libreoffice@bmlv.gv.at.

Many government departments around the world are moving away from vendor lock-in by tech giants, and switching to free and open source software like LibreOffice. This helps with privacy, security, and digital sovereignty. One such example is the Austrian Military (Bundesheer), which has moved 16,000 PCs from Microsoft Office to LibreOffice. We talked to them, to find out why and how they did it…

When did all of this start? When were the first decisions made?

It began in 2020, with the trend toward running software increasingly in the cloud and less on-premises on devices within companies. At that time, we examined what guarantees existed for running software – specifically Microsoft Office – directly in the workplace without any cloud connection. So the review and preparation began in 2020.

In late 2022 and early 2023, the decision was made to switch to LibreOffice. The goals were to ensure that data never leaves the company and that the office applications can be used without external dependencies.

Who made the decision?

The decision was structured in such a way that our “corporate leadership” – that is, the Federal Ministry of Defence – could decide, based on the information compiled regarding future software development and cloud dependencies, that we would switch to LibreOffice.

It was actually decided by the Federal Minister’s cabinet and the relevant departments – so at the very top.

Did you create a “timeline” at the beginning – something like “Y should happen by X” and so on?

After we received the assignment, we carried out the planning to determine how the transition could take place and what needed to happen. The plan included, from an early stage, that we would guide our users to LibreOffice in a timely manner, partly by installing LibreOffice at the user’s request. That is, we made it available, and the users who wanted it could have it installed.

We saw very high adoption rates – not 100%, but about half.

Half of 16,000?

Yes. And the next step we planned was to make its use mandatory, because it’s crucial not only to announce that something new is coming but also to require its use so that people have to start working with the tool early on. Of course, switching from an Office suite that’s been used in the company for over 30 years to a completely new product – even if it looks similar but behaves differently – requires practice.

That’s why we specifically made the use of LibreOffice mandatory in selected services. And we did this as early as 2023, so that users could get familiar with it well in advance. This gave users time to tailor the transition to their own needs and prepare for it, and we didn’t just flip the switch all at once with a “big bang.” The change was announced over the course of several years.

Finally, in December 2024, the use of LibreOffice became mandatory for internal collaboration. This meant we actually provided several years of preparation time to make this transition as smooth as possible.

(Photo credits: Bundesheer Fotos, CC BY-NC-SA 2.0)

So many people switched to LibreOffice voluntarily from the start, without being forced to. Was there a lot of resistance? Did you customise the user interface?

The 8,000 users mentioned installed the product to see what was coming. That doesn’t mean that all 8,000 of them immediately started using LibreOffice. But it was a good indicator for us to gauge the mood. If 200 people install it, that’s different from when there are so many.

Early on, before we mandated its use, we provided extensive e-learning modules and videos – including what we call “fast tracks” for the individual modules. With these, it was possible to learn the most important changes for Writer, Calc, Impress, and Base within 15 minutes, so users wouldn’t fall into the typical pitfalls. Anyone who invests those 15 minutes will find it much easier to use the software.

We gave users the opportunity to prepare and view these courses and videos on their own at a time of their choosing.

Another important point: We’ve learned that we need to quickly address individual users’ questions – such as those regarding unfamiliar workarounds or missing features – for the benefit of the broader community.

That’s why we specifically looked for suitable communication channels, and we then agreed to publish a so-called “Tip of the Week” about once a week on a very specific, clearly defined topic. And this “Tip of the Week” appears every Monday on the intranet with a current topic. That means anyone who opens their browser on Monday will see the “Tip of the Week.”

It explains topics we covered the previous week. When we release a new version, there’s a “Tip of the Week” featuring the latest features. When we roll out new functions and enhancements – some of which are sponsored by the Austrian Armed Forces – we highlight them in the “Tip of the Week.”

But we also cover usability topics – for example, how to enable the menu bar even when the tabbed interface is selected. How to use presentations across multiple screens, and so on and so forth. We’ve been doing these “Tips of the Week” for two years now, and they’ve been very well received. It’s a great communication tool for us.

Click here for part 2 of the interview

A truly open document format requires free public availability, royalty-free standards, and no usage restrictions.

Organizations like the Open Knowledge Foundation and the European Union use several core rules to guarantee long-term data access, system independence, and freedom from single-vendor control.

Core Openness Criteria

• Public Specification: The complete format rules are published and easy for anyone to access.
• Royalty-Free: Patents or licensing fees cannot block developers from building compatible software.
• No Discrimination: Anyone can use the format for any purpose without needing special permission.
• Independent Control: A transparent, non-profit standards body manages future updates.

Recognized Frameworks

• The Open Definition: Specifies exact legal and technical terms for open works.
• European Interoperability Framework (EIF): Requires governments to use truly open formats for public documents.

Comparison of ODF and OOXML

When evaluated against the strict criteria for open formats, Open Document Format (ODF) and Office Open XML (OOXML) take fundamentally different approaches.

While both are recognized as official ISO standards, ODF fully satisfies the open standard criteria by design, whereas OOXML features structural and legal complexities that often limit true open implementation.

Comparison Table

Key Openness Differences

Public Specification & Transparency

• ODF: Conceived from the beginning to be a modern, clean XML specification. “ODF is the only openly available standard, published fully in a document that is freely available and easy to comprehend”, as noted by GranneBlog: https://blog.granneman.com/2009/02/06/odf-compared-constrasted-with-ooxml/
• OOXML: Designed primarily to map Microsoft Office’s old binary data into XML. It is split into Strict and Transitional variants. “Transitional is everything else: a vast catalogue of compatibility features, deprecated elements, platform-specific behaviours, and references to undocumented quirks of Microsoft Office versions from the 1990s.”, as noted by the TDF Blog: https://blog.documentfoundation.org/blog/2026/06/02/a-standard-in-name-only/

Legal & Intellectual Property Rules

• ODF: Utilizes a standard open-source framework. Anyone can implement ODF in a project without fearing intellectual property or patent litigation.
• OOXML: Relies on the Microsoft Open Specification Promise (OSP): https://en.wikipedia.org/wiki/Microsoft_Open_Specification_Promise. The OSP is a unilateral covenant not to sue, but it only covers developers to the extent that they precisely mirror the specification. Any implementation-defined deviations or edge cases may leave developers legally unprotected.

Technical Discrimination & System Control

• ODF: Avoids hardware-specific dependencies, ensuring that independent applications (like LibreOffice or Apache OpenOffice) can render the data uniformly.
• OOXML: Contains platform-specific elements tied closely to the Windows OS ecosystem. Because Microsoft Office has traditionally produced Transitional OOXML by default, third-party platforms encounter massive conversion obstacles when interpreting legacy binary elements or proprietary formatting definitions embedded within the file structure.

INTERESTING REFERENCE: the Italian definition

The document Linee guida su acquisizione e riuso di software per le pubbliche amministrazioni (Guidelines on the procurement and reuse of software for public administrations), published by AgID in 2021, define an open format in the glossary as follows (translated from Italian):

Open (data) format. This is a public, versioned data format that is comprehensively documented and has no implementation constraints. An open format is one recognised by a standardisation body and maintained collaboratively by several organisations that provide competing implementations, through a transparent process. The format must remain consistent with the declared version.

The guidelines are not an interpretive gloss issued alongside the statute. They are adopted in implementation of articles 68 and 69 of the Codice dell’Amministrazione Digitale, under express delegations contained in the statute itself. They also supersede the earlier AgID circular 63/2013 on the same comparative assessment.

The definition of formato aperto (open format) is therefore not a recommendation that happens to be well drafted. It is the operative legal definition for Italian public administration, and it acquires that force through the statute rather than in spite of it.

Here’s our summary of updates, events and activities in the LibreOffice project in the last four weeks – click the links to learn more…

• We had one update in July: LibreOffice 26.2.5, the fifth maintenance update to the LibreOffice 26.2 branch.

• We also said a big welcome to our new TDF members! Members – more formally known as the “Board of Trustees” – are a crucial part of The Document Foundation, the non-profit entity behind LibreOffice. They are people from across the globe who contribute time, effort and skills, whether on a voluntary or paid basis.

• Then there was another section from the TDF Annual Report 2025, Policy and Digital Sovereignty. This section looks at Germany’s IT Planning Council committing to ODF, the approval of ODF 1.4, and public migrations to LibreOffice.

• On a similar topic, we posted how proprietary formats have become Microsoft’s main tool for lock-in.

• Back to the software itself: we posted the LibreOffice State of the Project (July 2025 – June 2026), based on data from July 1, 2025, to June 30, 2026, extracted from the LibreOffice dashboard and the Matomo repository. This is full of statistics describing the health of the project and the community.

• An additional section from TDF’s Annual Report 2025 was the foundation’s financials and budget.

• Meanwhile, the small team at TDF is expanding, with a job offer for a new Marketing and Communication Professional. Applications are open until the end of August.

• Finally, we wrapped up the month discussing Microsoft’s end-of-life of Office 2021, and how LibreOffice stays yours for a lifetime. And on a similar topic, we looked at why OOXML-based suites handle ODF badly.

Like what we do? Support LibreOffice with a donation – or join our community and help to make LibreOffice even better! Also keep in touch – follow us on Mastodon, Bluesky, Reddit and Facebook.

On 30 July 2026, the United States Cybersecurity and Infrastructure Security Agency published Open Source Software: Security Principles and Practices, a 31-page guidance document for federal civilian agencies. It is available at no cost and marked TLP:CLEAR, meaning it may be shared without restriction.

The document is addressed to US federal agencies, and it fulfils obligations under two executive orders on federal cybersecurity. It covers four areas: using open source solutions, contributing to open source projects, producing open source software, and evaluating open source artificial intelligence models. The observations below concern the first three.

Its analytical content is not jurisdiction-specific, and public administrations elsewhere — including in Europe — will find that it articulates, in the vocabulary of risk management, several positions that the open source community has been arguing for two decades.

What the guidance actually says

The central claim is more precise than the headlines suggest. CISA does not assert that open source software is more secure than proprietary software. It states that OSS is “no more or less risky than other software,” and locates the difference elsewhere: with open source, an organisation can assess code quality and security directly, rather than relying solely on vendor assurances.

This is a claim about verifiability, not about defect rates. It is also the more defensible claim, and the more consequential one for procurement. An agency evaluating proprietary software is evaluating a vendor’s statement about its own product. An agency evaluating open source software is evaluating the product.

The guidance draws the corollary explicitly. Among the benefits it lists for federal agencies is reduced vendor lock-in: open standards and modifiable code, CISA writes, protect agencies from “proprietary dependency traps.” A national cybersecurity authority has placed lock-in inside a security document rather than a competition-policy one. That is a meaningful shift in where this argument is permitted to live.

The C4 Framework

The most practically useful part of the guidance is Appendix A, which sets out the C4 Framework for assessing whether an open source project is trustworthy. Its premise is that, because contributors may be pseudonymous and are bound by no delivery obligation, trustworthiness cannot be assessed from who produced the software. It must be assessed from how the software was produced — which open source development makes visible in a way that closed development does not.

C4 groups the evidence into four categories:

• Codebase — commit recency, known vulnerabilities, dependency currency.
• Community — number of maintainers, institutional structure, whether the project sits within a foundation.
• Conduct — whether there is a vulnerability disclosure policy, whether code review is required, whether maintainers merge their own commits, the licence, the code of conduct.
• Configuration — whether defaults are secure, and what hardening the software supports.

The framework is applied in five steps: identify measurable criteria, determine risk tolerance and weight the criteria, collect observations (with automated tooling where available), evaluate against each criterion, and compare the result to the tolerance.

We would encourage public administrations to apply this framework to LibreOffice. Every category can be answered from public evidence: a continuous commit history since 2010, a published security policy and disclosure process, mandatory peer review, an OSI-approved licence, a documented code of conduct, and a governance structure — The Document Foundation, a German Stiftung with an elected Board of Directors — that is a matter of public record rather than of assertion.

We would encourage administrations to apply the same framework to every candidate solution, including proprietary ones, and to note which questions can be answered and which cannot.

Contributing, and the support question

The guidance also addresses a question that public administrations regularly raise about open source adoption: who is responsible for fixes. CISA’s answer is that no single entity is obliged to provide them, and that agencies should therefore plan accordingly — assigning internal staff, contracting third parties, or both — while following two principles in dealing with upstream projects: collaborate rather than demand, and push fixes upstream.

This is a fair description of how the LibreOffice ecosystem works. Support, long-term maintenance, and custom development are provided by certified developers and certified migration professionals, whose contributions return to the shared codebase and benefit every other deployment. The guidance is right that this requires organisations to plan for it. It is also right that the resulting improvements are shared rather than captured.

CISA further notes that where a project becomes unmaintained, an organisation may as a last resort take over a fork. This option has no equivalent in proprietary software, where end of support arrives on the supplier’s schedule and offers no remedy at all.

A note on scope

The document does not name any product. CISA states explicitly that it does not endorse commercial entities, products, or services, and nothing in the guidance should be read as an assessment of any particular software. What it provides is a set of criteria. The observation that LibreOffice satisfies them is ours, and rests on evidence that anyone may check.

Open Source Software: Security Principles and Practices is available from CISA: https://www.cisa.gov/resources-tools/resources/open-source-software-security-principles-and-practices

CISA’s announcement: https://www.cisa.gov/news-events/news/cisa-guide-helps-federal-agencies-securely-and-effectively-use-open-source-software

LibreOffice extensions are optional, third-party addons for the suite, that add extra functionality. Bora Yarkın has been working on a new extension for LibreOffice Impress, so let’s hear from him about it…

Tell us about it!

The extension lets you control a LibreOffice Impress presentation from your phone or any other device with a modern web browser.

When you start the remote, LibreOffice displays a QR code. Scan it with your phone and the presentation starts from the first slide. The phone interface then shows the current slide, presenter notes, elapsed time and navigation controls.

I tried to make the process as simple as possible: no separate mobile application and no manual pairing codes.

The remote can be opened from the Slide Show menu in LibreOffice’s top application menu bar—the menu alongside File, Edit, View and the other main menus.

This should not be confused with the Slide Show tab inside LibreOffice’s Tabbed user interface. LibreOffice’s UNO extension API does not currently let me add commands to that built-in tab. When using the Tabbed interface, the remote commands are therefore available under the Extensions tab instead.

The extension currently provides several connection modes:

• Local network: The phone connects directly to the computer running LibreOffice through its local IPv4 address. This is the main mode and the one I have tested most thoroughly.
• Direct IPv6: Works similarly, but uses an IPv6 connection. It is still marked experimental because my home internet connection is currently the only IPv6 network I can properly test with.
• Relay server: A small Python service that can be hosted on Linux or Windows. It is useful when the phone and computer are on different networks or when direct connections are blocked by carrier-grade NAT, firewalls or other network restrictions. It also supports multiple connections, so an organisation can host one relay server on its own infrastructure.
• LocalTunnel: An experimental fallback that creates an outbound connection through the LocalTunnel service. I consider this a last-resort option when the other connection methods are unavailable.

The compatible relay-server package is bundled with the extension. It can be downloaded or extracted directly from the Remote Settings window by selecting “Get Relay Server”. The package includes the required documentation and setup instructions.

To install the extension, download the .oxt file from the LibreOffice Extensions website or GitHub and open it with LibreOffice. It can also be installed manually through Tools > Extensions. After installation, restart LibreOffice if requested.

The extension includes translations for more than 100 languages and automatically follows LibreOffice’s interface language. English and Turkish are the two languages I have personally checked. Many of the other translations were created with ChatGPT, so I cannot guarantee their quality and would be very grateful for corrections from native speakers.

Why did you create it, and what was the process like?

The original inspiration came from Apple Keynote.

When Keynote is installed on both a Mac and an iPhone, the phone can be used to control the presentation while also displaying presenter notes. That feature completely changed the way I give presentations.

Over time, my slides became more professional and less text-heavy. Instead of putting everything on the slide, I started using the presenter notes almost like a teleprompter, with the text I actually planned to say. This helped move the audience’s attention away from reading the screen and back towards me.

That workflow worked perfectly for a long time, but I never really liked Keynote itself. I could not get used to its interface, and Apple’s decision to introduce paid features was the final reason for me to start looking for an alternative.

There were already several possible solutions, but none of them really worked for me.

LibreOffice previously had its own Impress Remote mobile application, but it has not been maintained for a long time and is no longer practical on many current devices and systems.

Browser-based presentation platforms can offer remote-control features, but I did not want my main presentation workflow to depend on an online service. They also do not offer the same flexibility as a full desktop office suite.

Microsoft Office was another possible option, but I am not a fan of Microsoft’s current direction, particularly the increasing integration of Copilot throughout its products.

OnlyOffice Desktop Editors is a good alternative and I used it for a while, but I encountered several bugs and eventually needed features it did not provide.

That brought me to LibreOffice, which I now find more useful and capable than the other office suites I tried. The only thing missing was the remote-presenter experience I had become dependent on with Keynote.

So I decided to build it myself.

I work mainly in IT and I am familiar with programming, but I would not describe myself as an advanced software developer. Before starting this project, I knew almost nothing about LibreOffice’s UNO API.

I began with ChatGPT. I defined the architecture, features, user interface and constraints myself—including requirements such as localisation being mandatory—and used AI to help me understand UNO and implement the code. The result turned out much better than I expected.

The extension was originally only a personal project. The first version was very basic; the web interface did not even have a back button. I had no intention of publishing it. Once it started working reliably, however, I realised that other LibreOffice users might want the same experience. I decided to take the project more seriously and turn it into a complete extension rather than something that only worked on my own computer.

That meant adding a more polished phone interface, connection settings, QR-code generation, IPv6 support, the relay server, LocalTunnel support, localisation, documentation, error handling and packaging.

Publishing it on the LibreOffice Extensions website was much easier than I expected. I created an account, created the project page, entered the information, uploaded the package and submitted it. After roughly a day of review, the extension was available publicly.

How can people help with testing and further development?

The source code and issue tracker are available on GitHub. The repository includes templates for bug reports, feature requests and pull requests.

My main development and testing setup is macOS with an iPhone. I have also tested the extension on Windows and Linux, but those tests were performed under less-than-ideal conditions, including virtual machines, Remote Desktop sessions and a headless Windows Server installation.

Because of that, testing on real Windows and Linux desktop systems would be especially useful.

The areas where community help would be most valuable are:

• Testing different LibreOffice versions
• Testing Windows, Linux and different macOS versions
• Testing Android devices and different mobile browsers
• Testing IPv6 connections between genuinely separate networks
• Testing the relay server in real-world and organisational environments
• Testing unusual firewall, VPN, NAT and carrier network configurations
• Reviewing and correcting translations
• Improving the documentation
• Reporting bugs and suggesting features
• Contributing fixes through pull requests

The local IPv4 mode has been tested extensively across different local networks, internet providers and VPN configurations. The IPv6, relay-server and LocalTunnel modes need broader community testing before I would consider them fully proven.

When reporting a connection problem, including the operating system, LibreOffice version, browser, phone type, selected connection mode and basic network configuration would help enormously.

The project started because I wanted this functionality for myself. Now I would like to make it reliable enough that other LibreOffice users and organisations can confidently use it for their own presentations.

Today we’re talking to Karl-Heinz Gruner, who has been supporting the LibreOffice community at events in Germany and recently became a member of The Document Foundation, the non-profit behind the suite:

Tell us a bit about yourself!

I live in Middle Franconia, near Nuremberg. In my spare time, I enjoy riding my motorbike, even though I haven’t been getting out on rides as much as I’d like at the moment. I find hiking in the region a great way to unwind. Being active in the fresh air brings me peace and relaxation, whilst also giving me space to come up with new ideas.

Professionally, I have worked extensively with office applications from various manufacturers – both from a user’s perspective and in the context of supporting other users. A particular focus of my involvement is my work with the local Linux User Group. There, I focus on open-source software solutions, sharing experiences and imparting practical knowledge.

For what are you using LibreOffice right now?

My personal curiosity and interest in practical IT solutions prompted me to carry out a fundamental modernisation of an association’s accounting system.

The starting point was an outdated spreadsheet program that was used to create entries, reports and statements. Initially, the idea was to migrate this solution to LibreOffice Calc, making it clearer and more future-proof.

However, during the analysis, it became clear that simply revising the existing spreadsheets would not be sufficient. Consequently, the decision was made to switch to a more up-to-date system with more comprehensive functions within the existing IT environment. A key outcome of this process is the use of a comprehensive application for administration and communication.

In addition to this, I developed a training programme for the adult education centre to focus on a specific area: the professional design of documents using forms and mail merges.

What do you plan to do in the future?

Looking to the future, I believe it is particularly important to convey information through a variety of channels. Modern software offers a wide range of functions, which many users initially find difficult to get to grips with.

It is therefore crucial to break down reservations and barriers to access. Potential users should be provided with clear information, given practical support and encouraged to try things out for themselves. Software and digital services must remain not only functional but also appealing.

For me, this means continuing to share knowledge through talks and training sessions, explaining practical applications using concrete examples, and convincing users of the benefits of open solutions.

My guiding principle is: inform, provide practical support, and spark interest.

Many thanks to Karl-Heinz for his help! All contributors to LibreOffice are welcome to become members of TDF