Grammar and Spell Checker - LanguageTool

Name: Grammar and Spell Checker - LanguageTool
Rating: 4.6858 (4417 reviews)
Author: LanguageTooler GmbH

With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

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LanguageTool is a powerful, free Chrome extension that checks your texts for spelling and grammar errors across more than 25 languages. Unlike basic spell checkers, it detects complex mistakes such as commonly confused words, grammar issues, and offers style suggestions to improve clarity and professionalism. It seamlessly integrates with nearly any website, including popular platforms like Gmail, Facebook, and Twitter.

Designed for both native and non-native speakers, LanguageTool supports multiple English variants and offers a personal dictionary feature for customized corrections. It prioritizes privacy by securely sending text for analysis without storing your IP address or requiring an account. This extension empowers users to write with confidence and polish their content effortlessly, making it an essential tool for anyone seeking reliable grammar and spell checking directly in their browser.

Productivity Writing

By:

LanguageTooler GmbH

Daily users:

385,862+ 1.67K

Rating:

4.69

(4,417) 9 new ratings

Version:

8.19.4 Last updated: 2025-04-15

Version code:

5926138

Creation date:

2016-06-10

Risk:

Permissions:

activeTab
storage
contextMenus
scripting
alarms

Size:

14.70M

URLs:

Website ,Privacy policy

Full description:

See detailed description ⏷

Source:

Firefox Browser Add-ons

Updated:

a day ago

Ranking

# 47

Other rankings

#3 in Language Support

#3 in Social & Communication

#1 in checker keyword 44

#1 in error keyword 19

#1 in grammar checker keyword 54

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Other platforms

AI Grammar Checker & Paraphraser – LanguageTool (v8.19.4)

752,110+ 4.80

(556)

User reviews

The add-on is praised for its effectiveness in grammar correction and language learning support, but users commonly mention concerns about privacy due to data being sent to servers and occasional inaccuracy in error highlighting.

Pros

Highly effective as a grammar and spell checking tool.
Useful for language learners.
Supports multiple languages.
Easy and quick to use for language improvement.
Generally well received and praised for functionality.

Cons

Privacy concerns due to the add-on sending all writing back to data centers.
Inaccurate error detection where it indicates more errors but doesn't specify their location.
Some users remain cautious about fully trusting the tool.“],
summary
The add-on is praised for its effectiveness in grammar and spell checking, especially beneficial for language learners and supporting various languages. However, multiple users reported concerns about the accuracy of error detection and significant privacy issues, as the tool sends all user input back to data centers. While generally considered useful, these privacy and accuracy issues temper full trust in the add-on.

Recent reviews

by Firefox user 17601116, 2025-05-11

by Firefox user 18987245, 2025-05-11

by LAVASh, 2025-05-11

View all user reviews ›

Extension safety

Risk impact

Grammar and Spell Checker - LanguageTool 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.
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Risk likelihood

Grammar and Spell Checker - LanguageTool has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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