Grammalecte

Windows · Mac · Linux · Extension

Freedom report

Three barsScore 6.4

Free tierA free tier is on its own pricing page
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Grammalecte is ranked #60 of 88 in grammar checkers on Freedom251. It runs on Browser extension, Linux, macOS, Windows. There is a free plan.

Grammalecte plans and pricing

All plans

Grammalecte Free Open-source software; French grammar and typography correction grammalecte.net · 8 Oct 2026

Compared on grammar checkers

Free plan: Yes
Browser extension: Yes
Desktop app: Yes

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The record

Style suggestions: Yes
Languages supported: 1
Purpose: Grammalecte is an open-source grammar and typography checker dedicated to French.
Error detection: It detects issues including punctuation, spacing, typography, repeated words, hyphenation, capitalization, agreement, conjugation, confusions, and pleonasms.
OCR option: An option can detect errors from optical character recognition.
Suggestions: The product includes several suggestion mechanisms and lets users enable or disable error-search categories.
Dictionaries: It provides Classic, 1990 Reform, and All Variants spelling dictionaries, with Classic selected by default.
Writing tools: Its text formatter can fix recurring errors and restructure text, and its conjugator covers about 8,000 verbs.
Integrations: The maker lists extensions for LibreOffice or OpenOffice, Firefox, and Thunderbird, plus a command-line interface, server, and Python package.
Chrome support: The maker says there is currently no Grammalecte version compatible with Chrome’s new extension API.
Data handling: The FAQ says Grammalecte collects no data, analyzes writing on the user's computer, and transmits no text.
Firefox security: The Firefox add-on is signed, its code is checked by Mozilla, and the maker says it sends no information online.
Thunderbird security: The maker says the Thunderbird add-on is unsigned and can be installed before its code has been checked; it sends no information online.
Limitations: The FAQ says the checker does not perform semantic analysis and cannot detect every mistake; false positives can still occur.
Price from: Free

Where it ranks on Freedom251

Best Grammar Checkers in 2026#60 of 88
Best AI Grammar Checkers in 2026#5 of 26

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Sources

grammalecte.net· checked 20 Sept 2026