Grammar and Spell Checker - LanguageTool

Name: Grammar and Spell Checker - LanguageTool
Rating: 4.6783 (4539 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.

Add-on Productivity Writing

By:

LanguageTooler GmbH

Daily users:

372,225 -3,657

Rating:

4.68

(4,539) 13 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:

14.02MB

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-17

Ranking

# 47

Other rankings

#3 in Language Support

#3 in Social & Communication

#1 in checker keyword 59

#1 in error keyword 16

#1 in grammar checker keyword 77

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Other platforms

AI Grammar Checker & Paraphraser – LanguageTool (v8.21.1)

810,671 4.80

(562)

User reviews

Users appreciate the add-on's strong spelling correction capabilities, support for multiple languages, and usefulness in formal writing. However, many find the AI features excessive and unwanted, with some experiencing poor grammar suggestions and performance slowdowns. Overall, it is recommended for language assistance but has notable drawbacks in grammar correction quality and system efficiency.

Pros

Effectively fixes spelling errors.
Helpful for formal email writing and improving orthography.
Supports multiple languages and assists in translation.
Highly recommended by users for language correction.
Positive initial impressions from users.

Cons

Unwanted AI features beyond simple spellchecking.
Provides poor grammar suggestions that can worsen sentence structure.
Performance issues impacting system speed.
Clunky user experience for some users.

Recent reviews

by As*****, 2025-07-17

by Fi*****, 2025-07-17

This makes my life so much easier.

by Fi*****, 2025-07-17

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Extension safety

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.

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

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 Browser Add-ons, 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.

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

Risk likelihood analysis details

Low This extension was updated more than 6 months ago. Older versions are more likely to be stable and safe.
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