A welcome commitment to open standards — and why it should end with ODF as Euro-Office’s native document format.

The Euro-Office pre-announcement has generated considerable coverage across the European press over the past few days. The Document Foundation welcomes the attention that open standards are receiving — and welcomes still more the commitment the announcement makes to them. Before the discussion settles, we would like to clarify one point and state one expectation.

Several reports have described Euro-Office as “the first European open source office suite.” Reading the pre-announcement carefully, we do not find the coalition making that claim, and it is not one we would endorse. Europe has been building free and open source office software for many years: LibreOffice, developed by this Foundation and a worldwide community, is itself European, mature, and far from alone.

The “first” framing appears to have emerged in the speed of a launch day rather than in the text of the announcement. We note it not to claim precedence — precedence is not the point — but because accuracy serves the cause of open standards better than enthusiasm alone.

Read on its merits, the announcement gives a great deal to welcome. The promise to improve support for the OpenDocument Format is precisely what the European free software community has long asked for, and we take it in good faith and with genuine appreciation. We have always held that sovereignty begins with the format, not with the logo on the application — and a coalition that understands this is one worth encouraging.

We would also state an expectation, in the spirit of encouragement rather than demand. Improved support is a beginning, not a destination. A format that is merely supported is one a suite can read and write as a courtesy, while a native format is the one in which its documents are created, stored, and trusted across the years — and that is precisely where digital sovereignty is won or lost.

The only destination consistent with the sovereignty Euro-Office invokes is ODF as its native document format. A genuinely European, genuinely sovereign office suite cannot treat the open standard as a concession to outsiders, it has to speak ODF as its mother tongue. The Document Foundation looks forward to that moment, and will be glad to acknowledge it when it comes.

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 started May by announcing the new LibreOffice website. Our previous website was looking rather old and becoming difficult to maintain, so the team at TDF – with help of the wider LibreOffice community – has been working on a redesign, based on newer technology.

• We reported back from the Augsburger Linux-Infotag, an event is all about Linux and free and open source software (FOSS) in south Germany, where the LibreOffice community was present.

• Throughout May, we continued our regular article series about the Open Document Format (ODF): Thank you, on behalf of ODF, Twenty Years On, ODF Is Still the Only Open Standard for Office Documents, and the Only One Governments Can Trust, and ODF vs OOXML, an issue that should never have existed.

• Then we announced projects selected for LibreOffice in the Google Summer of Code 2026, including: OpenType MATH; Improve word processor test coverage; and JPEG XL import support.

• In the middle of the month, we announced LibreOffice 25.8.7, the final maintenance release of the LibreOffice 25.8 family. From here we will focus on maintaining the 26.2 branch, and are preparing for 26.8, our next major release (due in August).

• The vast majority of income to The Document Foundation, the non-profit behind the LibreOffice project and community, is from donations from end users. We made a new video explaining how donations are used to support the community that makes the software.

• Next, we started posting sections from TDF’s Annual Report 2025, starting with Native Language Projects. A huge thanks to the hundreds of people who make LibreOffice available is so many languages around the world!

• Then we announced our New Web and Mobile Strategy for LibreOffice. LibreOffice is a desktop application, and we will continue making it. But we have constant requests for web and mobile versions, so we’re looking into what we can do. We already have a more detailed proposal from the TDF team.

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.

Love LibreOffice? Got experience with infrastructure and system administration? We are The Document Foundation (TDF), the non-profit entity behind LibreOffice. We’re passionate about free software, the open source culture and about bringing new people with fresh ideas into our project.

To assist the LibreOffice community with its work, we are looking for a full-time (remote) Infrastructure and System Administrator, to start as soon as possible.

Here’s what you’ll do

• System orchestration and OS management: Orchestrate, deploy, and maintain all internal and external systems, specifically standard and customised Linux operating systems, with the majority of machines running Debian GNU/Linux. We currently run SaltStack, but proposals for different ways to handle config management and deployment are welcome.
• Virtualisation and storage infrastructure: Manage virtualisation platforms and hypervisors (KVM/QEMU). Experience with GlusterFS (for the backup system) is a plus, but not mandatory.
• Database, cloud, and App Administration: Administer database servers such as MariaDB and PostgreSQL, cloud storage repositories (such as Nextcloud), web applications, email services, and developer tooling.
• Network and hardware maintenance: Maintain core physical and cloud network infrastructure, including routers, switches, and NAS storage, amongst them devices from MikroTik.
• Security and network access: Oversee firewalls, intrusion detection, antivirus, IP reputation, global mirror systems, and secure VPNs for users and machines.
• Identity and access management: Deploy and manage single sign-on (SSO) solutions, directory services, domain names, DNS zones, and SSL certificates (PKI).
• Ensure stable operations and monitoring: Together with teammates and volunteers, ensure stable infrastructure availability, manage log analysis, handle emergencies, and coordinate with external providers during outages.
• Patch management: Execute timely deployments of security and software updates within scheduled maintenance windows.
• Team coordination and documentation: Lead and coordinate the infrastructure team, volunteer contributors, and third-party vendors, while keeping technical documentation up to date.
• Data protection and disaster recovery: Implement backup and point-in-time disaster recovery solutions, and manage infrastructure-related GDPR compliance in cooperation with privacy officers.

What we want from you

• Very good sysadmin and infra maintenance skills on Linux
• Good team-playing abilities
• Speaking and writing English

As always, TDF will give some preference to individuals who have previously shown a commitment to TDF, including but not limited to members of TDF. Not being a member does not exclude any applicants from consideration.

Join us!

All jobs at The Document Foundation are remote jobs, where you can work from your home office or a co-working space. The work time during the day is flexible, apart from a few fixed meetings. The role is offered as full-time (ideally 40 hours per week). While we prefer full-time for the role, part-time applications, or proposals to grow the hours over time, will be considered. Candidates that are resident in Germany will be employed directly by TDF. Otherwise, external payroll services will be used if available in the candidate’s country of residence.

Are you interested? Get in touch!

TDF welcomes applications from all suitably qualified persons regardless of their race, sex, gender, disability, religion/belief, sexual orientation or age. Don’t be …

Dear office suite users,

In recent days you will have read various articles announcing the arrival of Euro-Office, which is being “marketed” as the first open-source office suite developed in Europe. We feel compelled — reluctantly, since open source should rest on transparency, not deception — to correct this claim. The first open-source office suite developed in Europe was OpenOffice.org in 2001, based on StarOffice’s source code, followed by LibreOffice from 2010.

These are two genuine open-source office suites, built from source code that originated in Europe. They are not a freeware clone of MS Office whose code provenance is undisclosed, nor a product that has rebranded itself out of pure opportunism to ride today’s wave of Digital Sovereignty.

It is worth remembering that many of those who champion Digital Sovereignty today were silent back in 2006, when the open ISO/IEC ODF standard — the pillar of Digital Sovereignty — was announced: not only did they not listen to us during all these years, but in some cases they greeted us with a condescending smile.

If we can speak of Digital Sovereignty in Europe today, it is thanks to The Document Foundation and LibreOffice community members at large, who kept the flag of open-source office suites flying when everyone was predicting their demise, and who continued to develop the only truly open and standard format that guarantees Digital Sovereignty, as it provides full user control over content.

Document formats are a subject still rife with misinformation. This is understandable on the part of Microsoft, which developed and controls the horrible proprietary OOXML format, designed precisely to prevent Digital Sovereignty by maintaining content lock-in. It is far less understandable on the part of companies that claim to advocate open source, such as those promoting Euro-Office.

Euro-Office defaults to the fully proprietary OOXML document format, developed and controlled solely by Microsoft. This makes it a de facto ally of Microsoft in its content lock-in strategy, with control remaining firmly in Redmond and far from Europe.

So, despite what is being written in support of Euro-Office — the latest of the office suites developed in Europe, and not the first — the announcement is not against Microsoft. On the contrary, it strengthens Microsoft’s strategy against European Digital Sovereignty, or, if you prefer, against the freedom of European users to control and manage their own content.

Berlin, 5 June 2026 – The Document Foundation today announced the release of LibreOffice 26.2.4, the fourth 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 26.2.4 is available for immediate download at libreoffice.org/download/ for Windows, macOS, and Linux.

Users of LibreOffice 25.8.x should update to LibreOffice 26.2.4 as LibreOffice 25.8 branch will reach end of life on June 12, and after that date the software will not receive security updates. In late August 2026, The Document Foundation will announce LibreOffice 26.8.

LibreOffice 26.2 introduced a broad set of improvements to daily productivity workflows, including Markdown import and export, connector shapes in Calc, multi-user Base, faster EPUB export, and mandatory Skia rendering on macOS and Windows for better graphics performance. LibreOffice 26.2.4 consolidates these advances with a focused set of fixes, addressing issues identified by users and testers since the initial release.

List of fixes in RC1: wiki.documentfoundation.org/Releases/26.2.4/RC1. List of fixes in RC2: wiki.documentfoundation.org/Releases/26.2.4/RC2.

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

When a public administration is told its documents are stored in “an ISO standard format,” the assumption is reasonable: an ISO standard ought to be a clean, implementable specification that any qualified software vendor can support. Standards exist precisely so that nobody is locked to a single supplier.

OOXML — ISO/IEC 29500, the format behind Microsoft’s docx, xlsx and pptx files — does not work this way.

The standard is split into two conformance classes. Strict is the clean version: a modern document format, free of legacy baggage, that an independent implementer could reasonably support. 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. The Transitional class exists to ensure that documents converted from the old binary doc, xls and ppt formats can be represented in XML without loss.

There is one detail that matters above all others: Microsoft Office has never produced Strict OOXML by default. The option to save in Strict format is available in the installed desktop applications but is absent from the browser-based versions of Microsoft 365 — and Microsoft’s various editions have long differed in which features they offer, with the macOS version historically providing a different set of options from the Windows version. The “ISO standard” that public administrations are actually storing their documents in, when they use Office, is Transitional — the messy one. Strict is a feature you can find if you know where to look, on the platforms where Microsoft has chosen to support it. That is not the treatment a serious open standard receives.

This has consequences that go well beyond a technicality.

The standard codifies undocumented legacy behaviour. Transitional OOXML contains compatibility flags whose specification amounts to “behave like Word 95” or “lay out footnotes like Word 97.” These are not formal definitions. They are references to the behaviour of specific commercial software products released more than thirty years ago — products whose layout algorithms were never published. An independent implementer wishing to render such a document correctly must reverse-engineer software from the Windows 95 era. This is not standardisation in any meaningful sense; it is the codification of one vendor’s implementation history as a global norm.

The standard perpetuates known bugs. Excel famously treats 1900 as a leap year — it was not — because Lotus 1-2-3 did so in the 1980s, and Microsoft chose binary compatibility with Lotus over arithmetic correctness [1]. OOXML Transitional preserves this bug. The default workbook setting in every xlsx file you have ever opened encodes a date arithmetic error from the era of MS-DOS. A spreadsheet calculating durations across February 1900 will produce wrong answers, and the standard requires this.

The standard includes obsolete graphics formats. Vector Markup Language (VML) was submitted by Microsoft to the W3C in 1998 as a candidate vector graphics standard. The W3C rejected it in favour of SVG. VML should have died there. Instead, it lives on inside OOXML Transitional, because documents converted …