LanguageTool

An open-source multilingual grammar, spelling, and style assistant for better writing across platforms

Rewrite & ProofreadingGrammar CheckerWriting AssistantMultilingualTrial

LanguageTool is a cross-platform multilingual writing assistant for grammar, spelling, style, and rewriting. It supports 30+ languages through browser, desktop, Word, Google Docs, and API integrations, with a strong focus on privacy.

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Updated

2026-09-03

Platforms

Web / Browser Extension / Desktop / API

Freemium

Free: available at no cost, with checks of up to 10,000 characters at a time and basic spelling and grammar corrections.Premium: approximately $4.99–$5.83/month when billed annually or for two years; monthly billing can be about $24.90/month. Premium adds AI sentence rewriting, deeper style improvements, and formatting suggestions.Team: approximately $5–$9/seat/month, with shared team dictionaries and centralized account management. Prices may vary by billing term and promotion.

* Pricing is for reference only; see the official site for current pricing.

languagetool.org

Key Features

Multilingual proofreading
Identify common language errors across supported languages as you write.
Style rewriting
Rewrite sentences and refine tone, style, and readability.
Cross-platform access
Use browser extensions, desktop apps, Word, Google Docs, and APIs.
Long-text review
Review longer content for punctuation, grammar, formatting, and clarity issues.