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LanguageTool

AI writing ยท languagetool.org

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Checking grammar, spelling, punctuation and style across several languages is the main job of LanguageTool, a writing assistant. Students, professionals and teams use its web editor, browser extensions, desktop apps and Office plugins, plus A.I. sentence paraphrasing, on a free tier or a Premium subscription.

Facts at a glance

FactValueSource
Free planFreemium: a free plan existslanguagetool.org/premium, checked 10 Nov 2026
PlatformsWeb, Chrome extension, Edge extension, Firefox extension, Safari extension, Windows, macOS, iOS, APIlanguagetool.org/premium, checked 10 Nov 2026

Pricing & plans

Model

Freemium

Free plan available

Money-back

14 days

For all Premium packages

  • Premium is sold on monthly, quarterly and yearly payment intervals; the prices load by script and are not in the page text

Source: languagetool.org/premium, checked 10 Nov 2026

Alternatives

Grammarly: Covers spelling and grammar in a free plan, while its Pro plan adds full-sentence rewrites and tone adjustment.

ProWritingAid: Includes 10 rephrases per day and 3 Sparks per day in its free plan, plus a thesaurus and word explorer.

Wordtune: Allows 10 rewrites and AI suggestions per day on its free plan, and paid plans start with a 3-day trial.

Sources: grammarly.com/plans, prowritingaid.com/pricing, wordtune.com/plans

LanguageTool Free, in practice

What the free plan covers and where it stops.

Free plan limits

  • 2,000 characters per text field
  • Limited Picky Mode
  • 3 A.I. sentence rephrasings per day

Sources: languagetool.org/premium

Features & platforms

  • Grammar and punctuation checking

  • Style and semantics suggestions

  • Sentence paraphrasing powered by A.I.

  • Picky Mode for extra checks

  • Team style guide with custom rules

  • Plugins for Google Docs, Word and LibreOffice

  • Web
  • Chrome extension
  • Edge extension
  • Firefox extension
  • Safari extension
  • Windows
  • macOS
  • iOS
  • API

Sources: languagetool.org/premium, checked 10 Nov 2026

Also in AI writing on Tools.us.org: Copy.ai, DeepL, Frase, Grammarly, Hemingway Editor, HyperWrite, Jasper, Lex, Microsoft Translator, Paragraph AI, QuillBot, Sudowrite, Wordtune, Writesonic

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