Comparison
LibreOffice vs ONLYOFFICE Desktop Editors for Windows
LibreOffice and OnlyOffice are both free-to-use alternatives to Microsoft Office, but they take different approaches to compatibility. LibreOffice, descended from OpenOffice.org, uses the OpenDocument format natively while offering strong import/export support for Microsoft's .docx, .xlsx, and .pptx formats. OnlyOffice was built from the ground up around Office Open XML compatibility, so its formatting fidelity with Word, Excel, and PowerPoint files tends to be closer out of the box.
LibreOffice ships as a fully free, open-source desktop suite (Writer, Calc, Impress, and more) with no online component required. OnlyOffice offers both a desktop editor and a server/cloud edition used for collaborative editing, and its business/cloud tiers involve paid plans, while the desktop editors remain free for personal use.
Feature depth also differs: LibreOffice has a longer track record and a very complete set of desktop productivity tools, while OnlyOffice's interface is deliberately styled to feel closer to modern Microsoft Office, which can shorten the learning curve for users coming directly from Word or Excel.
Feature comparison
| Feature | LibreOffice | ONLYOFFICE Desktop Editors |
|---|---|---|
| License | Free (Mozilla Public License, open source) | Free desktop editors; paid cloud/server plans |
| Native document format | OpenDocument (.odt/.ods/.odp) | Office Open XML (.docx/.xlsx/.pptx) |
| Microsoft Office file compatibility | Good, via import/export | Close, built around Office Open XML |
| Real-time collaboration | Limited (via LibreOffice Online, self-hosted) | Yes, in cloud/server editions |
| Platforms | Windows, macOS, Linux | Windows, macOS, Linux, web |
| Includes spreadsheet and presentation apps | Yes (Calc, Impress) | Yes (Spreadsheet, Presentation editors) |
| Developer | The Document Foundation | Ascensio System SIA |
Which should you pick?
Closest visual match to Microsoft Office
Pick: onlyoffice
OnlyOffice's interface and formatting engine were designed around Office Open XML compatibility.
Fully free desktop suite with no cloud requirement
Pick: libreoffice
LibreOffice is entirely free and open source with no paid tiers for the desktop applications.
Real-time collaborative editing
Pick: onlyoffice
OnlyOffice's cloud/server editions are built around collaborative document editing.
Long-established open-source track record
Pick: libreoffice
LibreOffice has been maintained by The Document Foundation since 2010, descending from OpenOffice.org.
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Frequently asked questions
Is OnlyOffice free?
The OnlyOffice desktop editors are free for personal use. Collaborative cloud and server editions are offered on paid plans; check the developer's pricing page for current details.
Does LibreOffice open .docx files?
Yes, LibreOffice can open and save Microsoft Office formats including .docx, .xlsx, and .pptx, though complex formatting may shift slightly.
Which is better for Excel-heavy spreadsheets?
Not verified as a blanket claim — OnlyOffice's format engine is built around Office Open XML, which can help with formula-heavy files, but complex spreadsheets should be tested with your specific files before switching.