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Collabora Online is an open-source online office suite developed by Collabora, based on LibreOffice Online, the web-based edition of the LibreOffice office suite. It enables real-time collaborative editing of documents, spreadsheets, presentations, and vector graphics in a web browser. Optional applications are available for offline use on Android, ChromeOS, iOS, iPadOS, Linux distributions, macOS, and Windows. It supports the OpenDocument format and is compatible with other major formats, including those used by Microsoft Office. Collabora is a commercial partner of The Document Foundation (TDF), the nonprofit organization behind LibreOffice. TDF states that a majority of the LibreOffice software development is done by its commercial partners like Collabora.