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LanguageTool

Freemium
AI Browser Extensions3k views

Open-source AI grammar and style checker supporting 25 languages for all text editors.

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#open source#multilingual#grammar#25-languages

About LanguageTool

LanguageTool is an open-source AI grammar and style checking tool supporting over 25 languages. Its browser extension checks text across web apps for grammar, punctuation, style, and commonly confused words. LanguageTool is a strong alternative to Grammarly for multilingual users, with particularly strong support for German, Spanish, and French.

Key Features

  • 25+ language support
  • Grammar & style check
  • Browser extension
  • MS Office add-in
  • API access

Best For

✓ Non-native English writers✓ Multilingual teams✓ Students

✓Pros

25+ languages
Open-source
Good multilingual grammar

✗Cons

Less powerful than Grammarly for English
UI less polished

Frequently Asked Questions

Pricing

Freemium
Try LanguageTool →

Quick Info

Category
AI Browser Extensions
Pricing
Freemium
Website
languagetool.org
DeepAITool Editorial Team
Updated Jun 19, 2026
Fact Checked

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