LanguageTool is an Open Source proof­reading soft­ware for English, French, German, Polish, and more than 20 other languages.

It finds many errors that a simple spell checker cannot detect and several grammar problems.

Download

LanguageTool for LibreOffice and OpenOffice
Version 2.5 — 45 MB — Requires Java 7+
LanguageTool stand-alone for your Desktop
Version 2.5 — 70 MB — Requires Java 7+
LanguageTool browser extension for Firefox
 

Please see our checklist if you experience problems. Download old releases or daily builds. Start with Java WebStart.

License & Source Code

LanguageTool is freely available under the LGPL 2.1 or later.
The source is available on github.

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