Grammalecte review
A focused, free French proofreader with deep language tools and local text analysis.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Grammalecte is a free, open-source proofreading tool focused on French grammar, spelling, punctuation, spacing, typography, agreement, conjugation, homonyms, redundancy, hyphenation, capitalization, and OCR-related errors. It suits French writers, editors, translators, and organizations that want detailed language checking within LibreOffice or OpenOffice, or through Firefox and Thunderbird modules. Developers and technical users can also work with its command-line interface, server, or Python package. Text analysis is performed locally, and the project states that text is not transmitted or stored.
Its strongest differentiator is breadth within French language mechanics. Grammalecte provides grammar suggestions, a formatter for recurring errors and restructuring, a conjugator covering approximately 8,000 dictionary verbs, lexical analysis, a lexicographer, and a custom lexical dictionary editor. That combination goes beyond basic spelling correction and gives advanced users tools for terminology and recurring writing patterns. The published integrations also make it practical for document and email workflows built around LibreOffice, OpenOffice, Firefox, and Thunderbird.
The trade-off is a narrow platform and language focus. The listed platforms are Linux and API, with no mobile app or desktop app, while Chrome compatibility is unavailable under the new Chrome extension API. Grammalecte includes style suggestions, but tone detection is not part of the feature set. Choose it for open-source French proofreading, local processing, technical deployment, and detailed grammar or typography control. Consider another grammar checker if you need mobile access, Chrome support, broader language coverage, or tone-focused guidance.
Grammalecte pros and cons
- Where it wins
- Detailed French grammar, spelling, typography, and conjugation checks
- LibreOffice, OpenOffice, Firefox, and Thunderbird integrations
- Local analysis with formatter, conjugator, and custom dictionary tools
- Where it doesn't
- Focused on French rather than broad multilingual proofreading
- No mobile app and no desktop app listed
- Chrome compatibility is unavailable under the new extension API
Grammalecte fact sheet, pricing and score →
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