Best LibreOffice extensions for Windows
| Extension | What it does | For |
|---|---|---|
| LanguageTool | Advanced grammar and style checker, 30+ languages | Writer |
| Grammalecte | French grammar checker | Writer |
| Template Changer | Assign different templates to documents | Writer |
| Zotero | Academic citation and bibliography manager | Writer |
| Titivillus | Detects typographic errors and style issues | Writer |
| MultiSave | Save simultaneously as ODF, DOC and PDF | Writer |
| Calc Add-ins | Additional mathematical and statistical functions | Calc |
| Export as Images | Export Impress slides as PNG or JPG | Impress |
| Pdfimport | Import and edit PDF files in Draw | Draw |
| APSO | Advanced Python Scripting Organiser for macros | All |
How to install LibreOffice extensions on Windows
- 1
Download the extension
Go to extensions.libreoffice.org and download the .oxt file for the extension you want.
- 2
Open Extension Manager
In LibreOffice: Tools → Extension Manager (or Ctrl+Alt+E).
- 3
Click Add
Click Add, browse to the .oxt file and select it. Click OK to install. Some extensions require restarting LibreOffice.
Install LibreOffice templates on Windows
Templates (.ott for Writer, .ots for Calc) can be installed via:
- File → Templates → Manage Templates → Import
- Or copy .ott files to
%APPDATA%\LibreOffice\4\user\template - Download templates from templates.libreoffice.org
Extension questions
LibreOffice extensions not working after update
Extensions sometimes need to be updated after a LibreOffice major version update. Go to Tools → Extension Manager → Check for Updates. If an extension is not compatible with the new version, check the extension's page at extensions.libreoffice.org for an updated version.
Best LibreOffice extensions 2026 — which are most useful?
For most users: LanguageTool (grammar checking), Zotero (if you write academic papers) and MultiSave (if you share files with Office users). These three cover the most common needs not built into LibreOffice.