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 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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The philosophy behind ODF: openness, freedom and control

File formats are not usually the subject of philosophical debate because most users just want to open, save and share documents without any problems. However, the Open Document Format (ODF) is based on concepts that are much more important to users than might initially seem the case. ODF is not

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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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The philosophy behind ODF: openness, freedom and control

File formats are not usually the subject of philosophical debate because most users just want to open, save and share documents without any problems. However, the Open Document Format (ODF) is based on concepts that are much more important to users than might initially seem the case. ODF is not

read more »

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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