ONLYOFFICE is a productivity suite that provides document, spreadsheet, presentation and PDF editors. It offers desktop applications for working locally alongside browser-based editors designed for collaborative editing and integration with document management systems.
The software places particular emphasis on compatibility with Microsoft Office formats. Its editors provide familiar document creation and formatting tools, making it suitable for individuals and organisations that routinely exchange Word, Excel and PowerPoint files.
The desktop applications work without an internet connection. Users can also connect to compatible cloud storage and collaboration platforms, allowing them to switch between local editing and shared document workflows.
This is free and open source software.
Key Features
- Document editor – creates and edits text documents with styles, tables, images, headers, footers, references and change tracking.
- Spreadsheet editor – provides formulas, functions, charts, pivot tables, conditional formatting and data analysis tools.
- Presentation editor – creates slide presentations with templates, transitions, animations, multimedia and presenter tools.
- PDF editor – views, annotates, edits and organises PDF documents.
- Form creator – designs fillable forms and prepares documents for collecting structured information.
- Diagram viewer – opens and displays compatible diagram files.
- Microsoft Office compatibility – works with DOCX, XLSX and PPTX alongside other common document formats.
- OpenDocument support – opens and saves ODT, ODS and ODP files.
- Real-time co-editing – allows multiple users to edit shared documents using compatible online services.
- Collaboration tools – includes comments, change tracking, document comparison and review facilities.
- Cloud integration – connects to supported services including Nextcloud, ownCloud, Seafile and ONLYOFFICE platforms.
- Document security – supports password protection and digital signatures.
- Extensions – adds functionality through compatible editor plugins.
- Customisable interface – provides scalable display settings, themes and dark mode.
- Cross-platform support – runs on Linux, macOS, and Windows.
Website: www.onlyoffice.com
Support: GitHub Code Repository
Developer: Ascensio System SIA
License: GNU Affero General Public License v3.0
OnlyOffice is written in C++ and JavaScript. Learn C++ with our recommended free books and free tutorials. Learn JavaScript with our recommended free books and free tutorials.
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