Grammalecte [fr]

Name: Grammalecte [fr]
Rating: 4.27 (100 reviews)
Author: Algoo

By: Algoo

French grammar checker. Included: conjugation tool, lexicographer, text formatter and spelling dictionaries.

Download

Install

Features & Capabilities

Grammalecte is a powerful French grammar checker designed to improve your writing with precision and convenience. It offers an extensive conjugation tool covering around 8,000 verbs, a lexicographer, and a text formatter that automatically corrects common typographical errors.

Unlike many online grammar tools, Grammalecte is fully written in JavaScript and operates entirely offline, ensuring your data remains private with no information sent online. It integrates seamlessly with various platforms including Thunderbird, Chrome, LibreOffice, and OpenOffice, providing comprehensive support for French language users seeking accurate grammar and spelling assistance.

User Growth & Download Statistics

Add-on Education Writing

By:

Algoo

Daily users:

12,690 -148

Rating:

4.27

(100)

Version:

2.3.0 Last updated: 2025-12-22

Version code:

6099303

Creation date:

2016-05-06

Risk:

Permissions:

*://localhost/*
*://dic.grammalecte.net/*
activeTab
contextMenus
cookies
downloads
clipboardWrite
storage

Content scripts matches:

<all_urls>
*.wikisource.org
*.wikipedia.org
*.wiktionary.org

Size:

6.90MB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-20

Compare stats and ranking:

Ranking

# 670 ▲ 2

Other rankings

#27 in Language Support

#94 in Other extensions ▲ 1

#2 in ai grammar keyword 72

#5 in grammar keyword 70

#16 in french keyword 13 ▲ 2

Upgrade to see more rankings

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Algoo

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/grammalecte-fr/

Website:

https://grammalecte.net/forum.php?prj=fr&f=8

User Reviews

Grammalecte [fr] is praised for its accurate French grammar error detection and usefulness across various platforms, making it indispensable for many users. However, multiple users report functional issues, especially with formatted text inputs like Overleaf, causing text corruption or duplication. Some find it complex to use or lacking visible error highlights. A few strong negative reports claim it injects ads and disables ad blockers, though these are less widespread. Overall, the add-on is valued but may face compatibility and usability challenges for certain users or contexts.

Pros

Detection of grammatical errors is accurate and pertinent.
Very useful and even indispensable for those who want to avoid mistakes in French writing.
Compatible and used across multiple platforms including LibreOffice, Firefox, Chrome, and Chromium.
Provides comprehensive corrections and is appreciated by its user base.
Free and open-source tool maintained actively by the developer.

Cons

Incompatibility issues with formatted text areas like Overleaf, leading to document corruption or loss.
Not all users find it works well; some report it as unusable or causing text duplication and reordering errors.
Reported that it may inject unwanted advertisements and block ad blockers (though this is a strong claim with limited corroboration).
Some find the extension complicated, not intuitive, or difficult to use, especially for less tech-savvy users.
Lack of visible error highlighting in some input areas frustrating users.

Recent reviews

Merci ! 😍😍😍

by Hu*****, 2025-07-22

Le module détecte correctement les erreurs que j'ai testées. Mais c'est dommage que je ne vois pas les erreurs dans la zone de saisie. Est-ce que j'ai manqué quelque chose ?

by tm*****, 2025-06-22

Outil extrêmement pratique. Est-il utile ? Non, il est indispensable à qui veut écrire sans faire, trop, de fautes.

by Mo*****, 2025-05-25

View all user reviews ›

Is Grammalecte [fr] Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Grammalecte [fr] requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
Critical ******* ****** ** *** ********* ******** ********** **************** *************** ************** **************
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
High ****** ******* *** ********* ********* ******** ***** *** ** ********** ****** * ******** ******* *****
Medium ****** ********** ** ******** ********** *** ********* ******* ******** ****** ******** ****** ********

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Grammalecte [fr] is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension website URL may be invalid
Medium **** ********* *** ****** **** ****** ********* ********** *** *** ** ****** ** *****
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******