LibreOffice-focused talks at the Open Source Conference 2025 Luxembourg

The Open Source Conference 2025 will take place the 1st of October 2025 in Belval, Esch-sur-Alzette, Luxembourg, following a very successful first edition in 2024 in combination with the LibreOffice Conference. Open Source software, together with data sovereignty, form the basis to achieve Digital Sovereignty as an inclusive effort where all the participants cooperate to create the tools we need to protect our data, while sharing the technologies that improve everyone’s digital lives. This year’s main tracks provide the opportunity to share the experiences of those that have chosen to produce and implement Open Source tools and platforms that improve security, resilience and data protection.

During the day, there will be several talks focused on LibreOffice or by LibreOffice community members:

  1. Open Innovation and Open Source in Schleswig-Holstein, by Sven Thomsen, CIO of the State of Schleswig-Holstein
  2. Free your mayor! Digital transformation and free software in Échirolles, by Nicolas Vivant, IT Manager of the City of Échirolles
  3. The foundation behind LibreOffice, by Florian Effenberger, Executive Director of The Document Foundation
  4. This is how it works: Open Source as competitive factor in the private (and public?) sector, by Lothar Becker, Managing Director of .riess-applications

Registration is still open: conference.opensource.lu/registration/

Video recap: LibreOffice Conference 2025

Here’s a quick video recap from the recent LibreOffice Conference 2025 which took place in Budapest. Thanks to everyone who attended 😊 (The video is also available on PeerTube.)

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LibreOffice case study: Flotte Karotte

LibreOffice in business

Companies around the world use LibreOffice to reduce costs, improve their privacy, and free themselves from dependence on single vendors. Today we’re talking to Flotte Karotte, a German company with 50 employees that recently made a generous donation to support the LibreOffice project and community:

What is Flotte Karotte?

Flotte Karotte is an organic delivery service. We have been in business since 1996. Starting out as a marketing channel for regional growers with the aim of bringing organic produce to the masses, we have since become a full-range supplier. This means that in addition to fruit and vegetables, we also deliver bread, meat and sausage, dairy products, pasta, grains/seeds, sauces, spreads, cosmetics, etc. In other words, everything you would find in an organic supermarket. However, we focus on brands that are loyal to the organic trade and are not usually sold in conventional food retail outlets. We also prioritise association products (Bioland, Demeter) over EC organic products wherever possible.

We attach great importance to seasonality and regionality. Of course, the latter cannot be achieved for all products (bananas). Wherever possible, we try to source from regional growers. We have been working with regional farmers and vegetable growers for years. What makes us special is that we can offer smaller farms in particular a secure marketing channel. This enables the farms to grow more different crops and thus promote diversity. They would not be able to sell these smaller quantities in the wholesale market.

We currently have around 50 employees working in the office, and as drivers and in packing. Sustainability is also important to us when it comes to mobility. Since 2017, we have been increasingly focusing on electric mobility and now deliver almost exclusively by electric vehicle. In the Essen Rüttenscheid district, we deliver exclusively by cargo bike with our partner Roman from Frachtradler.

Values: products, sustainability, cooperation

When did you start using free and open source software (FOSS)?

We have relied on open source from the very beginning. Among other reasons, this is of course due to cost considerations. However, it is also because, as in trade and cultivation, we are critical of the concentration of power and the associated dependence on a few providers in the software services sector.

Which apps do you use in the company?

We use Thunderbird as our email programme, Mozilla Firefox as our default browser, and LibreOffice as our office software (especially for word processing and spreadsheets). Our server runs on Linux, and we use Proxmox for virtualisation.

What have been your experiences with LibreOffice so far?

LibreOffice fully meets our requirements for office application software. There is only one compatibility issue with a public sector contractor who works with Microsoft. A formula used in their Excel spreadsheet is not supported by LibreOffice. However, the solution here should be for the public sector to become independent of proprietary software from the US.

Many thanks again to Flotte Karotte for their generous donation! We hope they continue to find LibreOffice useful for many years to come.

TDF Annual Report 2024

The Annual Report of The Document Foundation describes the foundation’s activities and projects, especially in regard to LibreOffice and the Document Liberation Project.

We’ve been posting sections of the 2024 report here on the blog, and now the full version is available in PDF format on TDF’s Nextcloud server in two different versions: low resolution (6.6MB) and high resolution (56.2MB). The Annual Report is based on the German version presented to the authorities.

The document has been entirely created with free open source software: written contents have obviously been developed with LibreOffice Writer (desktop) and collaboratively modified with LibreOffice Writer (online), charts have been created with LibreOffice Calc and prepared for publishing with LibreOffice Draw, drawings and tables have been developed or modified (from legacy PDF originals) with LibreOffice Draw, images have been prepared for publishing with GIMP, and the layout has been created with Scribus based on the existing templates.

We at The Document Foundation are very grateful to all contributors to our projects and communities in 2024 – none of this would be possible without you!

How to resolve common compatibility issues with ODF files

Troubleshooting opening, formatting, and data loss issues with Open Document Format files

ODF files are great for sharing documents across multiple platforms, but they don’t always work perfectly, especially when using Microsoft Office or other software based on proprietary formats. If you’ve encountered problems opening, editing, or preserving the formatting of .odt, .ods, or .odp files, you’re not alone.

Here’s an overview of the most common compatibility issues with ODF files, along with their solutions.

1. The ODF file does not open in Microsoft Office

Opening an .odt file with Word or an .ods file with Excel is unsuccessful, and the file opens with formatting errors. Microsoft Office supports ODF, but not always correctly, and although support has improved in recent versions, files continue to have difficulties with some features.

There are two solutions: updating Microsoft Office, as compatibility improves with each new version; and converting with LibreOffice, which natively handles ODF files and, in compatibility mode, .docx and .xlsx files much better than Microsoft Office does with .odt and .ods files.

2. Formatting changes during transfer between suites

A file may appear perfect in LibreOffice, but when opened in Microsoft Office, the layout, fonts or spacing may change. This happens because the two software programmes interpret elements such as text boxes, tables and styles differently. Line spacing and bullet points may also change.

The solution is to use simple formatting in all cases where the file is shared between multiple office suites, avoiding complex layouts, unusual fonts and embedded elements. If formatting is more important than editability, you can use PDF format for the final version.

3. Images and graphics disappear or become corrupted

Images or graphics embedded in the document disappear, become distorted or can no longer be edited when opened with other software. This is because their formats are specific to the software that created the file – and therefore proprietary – and not standard, as is often the case with Microsoft Office.

The solution is to use standard formats, such as PNG or JPG for bitmap images, and SVG for vector images. In some cases, it is advisable to convert images before embedding them in the document and, if possible, simplify them (without altering them).

4. Macros and scripts do not work

Macros written in one suite do not work (or cause errors) in another. This is a known problem, linked to the fact that the scripting languages – Microsoft Office VBA and LibreOffice Basic – are proprietary and therefore incompatible with each other.

The solution is to avoid macros when sharing files, and if it is really impossible to do without them, you need to rewrite the scripts for each platform, using the respective languages. Unfortunately, there are no shortcuts or interoperable solutions.

5. Some data is lost when saving in proprietary format

In some cases, quite sporadic, saving an ODF file in proprietary format causes data loss. Unfortunately, this is a problem due to the artificial complexity of Microsoft Office proprietary files, which use an XML syntax that is very different from the standard in order to limit file interoperability. The solution is to always keep a copy of the original ODF file, because the format is much more robust and, above all, can be recovered by the user in case of file corruption.

In these cases, LibreOffice is the user’s best friend, because it handles ODF files natively and exports clean .docx, .xlsx and .pptx files with XML syntax that never reaches the level of artificial complexity of Microsoft Office.

Final considerations

ODF is the best open standard format for office documents. It is robust and flexible and was created to protect users’ rights thanks to its features that make it independent, interoperable, neutral and perennial. However, this does not mean that it is perfect and easy for developers to implement when the software has not been developed with the same objectives as LibreOffice, as in the case of Microsoft Office.

If problems arise, the key is to know what each office suite can and cannot handle, bearing in mind that LibreOffice was developed with the aim of protecting the interests of users, while proprietary suites were developed to protect the commercial interests of vendors.

The secret is to keep things simple, focusing on the content rather than the appearance of the document. When in doubt, always use the safest format, which is ODF.

Czech translation of LibreOffice Calc Guide 25.2

Czech LibreOffice Calc Guide cover

Zdeněk Crhonek (aka “raal”) from the Czech LibreOffice community writes:

The Czech translation of the LibreOffice Calc Guide 25.2 is now available, thanks to the endless efforts of our team. It was translated by Petr Kuběj, Radomír Strnad and me. The Czech screenshots were done by Roman Toman, Petr Kuběj and me. Preparation of the chapters for translation was done in OmegaT – machine translation as suggestions, reuse of old screenshots etc. was done by Miloš Šrámek. Thanks to everyone for the hard work, and if anyone would like to join the team, they are welcome to do so.

Great work everyone!