Your private, free office suite

LibreOffice is a private, free and open source office suite – the successor project to OpenOffice.
It's compatible with Microsoft Office/365 files (.doc, .docx, .xls, .xlsx, .ppt, .pptx) and is backed by a non-profit organisation.

Out now: LibreOffice 25.8

Interface improvements • New spreadsheet functions • Faster file loading

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LibreOffice Conference 2025

September 4 – 6 in Budapest. Join us!

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Fantastic People

LibreOffice is about more than software. It’s about people, culture, creation, sharing and collaboration.

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LibreOffice is Free and Open Source Software. Development is open to new talent and new ideas, and our software is tested and used daily by a large and devoted user community.

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Meet the LibreOffice community at FOSDEM 2026!

FOSDEM is the biggest free and open source software (FOSS) event in Europe, and will take place on 31 January and 1 February in Brussels, Belgium. And the LibreOffice project and community will be there! Come to our stand, have a chat, and grab some cool merchandise (stickers, flyers, and

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State of the Project – Calendar Year 2025

Starting in January 2026, at the beginning of each quarter, i.e. in January, April, July and October, I will publish a slide deck with updated statistics on the LibreOffice project. Unless there are specific requirements, the statistics will refer to the last 12 calendar months. Therefore, the January statistics will

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Validating ODF and OOXML files

In LibreOffice development, there are many cases where you want to validate some documents against standards: either Open Document Format (ODF) or MS Office Open XML (OOXML). Here I discuss how to do that. Open Document Format (ODF) Validation ODF is the native document file format that LibreOffice and many

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Meet the LibreOffice community at FOSDEM 2026!

FOSDEM is the biggest free and open source software (FOSS) event in Europe, and will take place on 31 January and 1 February in Brussels, Belgium. And the LibreOffice project and community will be there! Come to our stand, have a chat, and grab some cool merchandise (stickers, flyers, and

read more »