Grammalecte is a French grammar checker.

It also includes: — 4 spellchecker dictionaries (to choose from), — a conjugation tool (which contains approximately 8000 verbs), — a text formatter (to automatically correct most of typographical mistakes), — a lexicographer. Unlike other grammar checkers, Grammalecte is written in full JavaScript, doesn’t require a server and can work offline. No data is sent online. Grammalecte also exists for LibreOffice, OpenOffice, Firefox, Chrome, and more.