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Grammalecte

Free#73 of 88 in Grammar CheckersAI Grammar Checkers

Grammalecte: A focused, free French proofreader with deep language tools and local text analysis. Ranked #73 of 88 in Grammar Checkers by our editors (3.0/10); pricing: Free plan; best for open-source French proofreading users.

3.0/10Editor score

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Grammalecte3.0 Visit Grammalecte

At a glance

Editor score
3.0 / 10
Pricing
Free plan
Best for
Open-source French proofreading users
Free plan
Yes
Paid from
Free
Facts checked
20 Sep 2026

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

Our verdict on Grammalecte

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.

Your product? Our editors can test Grammalecte in depth and publish a review, labelled as paid · from $149/mo →

Grammalecte pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on grammalecte.net

Grammalecte fact sheet

Free plan	Yes
Paid from	Free
Browser extension	Yes
Desktop app	Yes
Mobile app	Not verified
Style suggestions	Yes
Tone detection	Not verified
Languages supported	1
Deployment	Desktop, Browser extension
Platforms	Linux
Built for	Solo, Small business (editorial estimate)
Integrations	5 integrations: LibreOffice, OpenOffice, Firefox, Thunderbird, Python
Pricing	Free plan
Website	grammalecte.net
Facts checked	20 Sep 2026

Grammalecte integrations

Grammalecte lists 5 integrations on its own site.

LibreOffice
OpenOffice
Firefox
Thunderbird
Python

Alternatives to Grammalecte

See all Grammalecte alternatives →

Also Ranked In

Grammalecte is ranked in 2 of our directories.

#20AI Grammar Checkers26 tools ranked

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Grammalecte for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

Grammalecte is listed in our Grammar Checkers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update