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An open-source-rooted grammar and style checker covering 30+ languages, with AI rephrasing in the paid tier.

grammar-checkerparaphrasingmultilingualbrowser-addonstyle-checkerwriting-assistant
LanguageTool screenshot

About LanguageTool

LanguageTool is an AI-based grammar checker covering 30+ languages, offering a free tier and premium with unlimited paraphrasing. It checks grammar, spelling, and style, and provides a paraphrasing tool to rephrase sentences. The browser add-on works on Chrome, Firefox, Edge, Safari, and Opera, and integrates with email clients and office suites. Premium includes advanced suggestions, picky mode, and a personal dictionary. It suits writers, professionals, and non-native speakers needing multilingual writing assistance.

Features

  • Grammar and spell check
  • Paraphrasing tool
  • 30+ language support
  • Browser add on
  • Personal dictionary
  • Picky mode

Tool Details

Editorial score
4.3/5
Category
AI Writing & SEO
Last verified
2026-07-10
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