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LanguageTool

Pricing: Free

Verified: Yes

Editor rating: 4.3/5

Updated: October 2026

Multilingual AI writing assistant correcting grammar, spelling, style across 30+ languages with browser extensions and desktop apps.

Free tier (verified July 2026): Unlimited basic proofreading — catch: advanced style rules are Premium

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Editor's Verdict

Official Review

LanguageTool checks grammar, spelling, punctuation, and style across 30+ languages with context-aware corrections that go beyond simple rule matching. The open-source core adds transparency and customization options not available in closed alternatives. Browser extensions integrate directly with Gmail, Google Docs, and WordPress. Free tier covers solid everyday proofreading; Premium at $12/month adds advanced style rules, picky mode, and plagiarism detection. A strong Grammarly alternative with notably wider multilingual coverage.

4.3 / 5.0

Editor Rating

Reviewed by Sohail Akhtar

Lead Editor & Founder

Pros

What we like

Context-aware grammar and style corrections in 30+ languages including Spanish, French, German, and Portuguese
Open-source core enables custom dictionary additions and technical terminology integration
Browser extensions work directly in Gmail, Google Docs, WordPress, and Medium without copy-paste
Free tier provides unlimited basic proofreading with no character or document count limits

Cons

Limitations

Premium at $12/month is required for advanced style rules, picky mode, and plagiarism detection
Style suggestions can over-correct toward generic prose — not always appropriate for intentionally informal or creative writing
Desktop app offline mode is less polished than the browser extension experience for document workflows

Pricing

✓ Free tier re-verified July 2026: Unlimited basic proofreading — advanced style rules are Premium

Free unlimited basic proofreading. Premium $12/month advanced style rules, plagiarism checker.

What is LanguageTool?

LanguageTool analyzes text providing intelligent suggestions for grammar, spelling, punctuation, and style in 30+ languages including English, Spanish, French, German, and more. Students, professionals, writers improve clarity and correctness instantly across platforms. Open-source core ensures transparency and customization. Context-aware corrections understand sentence structure beyond simple rules. Style suggestions enhance readability and tone consistency. Picky mode catches subtle stylistic issues. Plagiarism checker scans against web content. Dictionary integration supports technical terminology. Browser extensions work in Gmail, Google Docs, WordPress, Medium seamlessly. Desktop apps handle large documents offline. API enables custom integrations. Premium unlocks advanced style rules and team features. Free core proofreading; Premium enhances professional writing. Instant analysis across all platforms. Browse similar tools.

Associated Tags

grammar checker ai, style correction ai, 30 language proofreader, plagiarism detector ai, browser writing extension, offline grammar tool

Key Features

30+ languages grammar/style checking

Context-aware corrections

Browser extensions (Gmail/Docs)

Desktop apps offline support

Plagiarism detection

Custom dictionary integration

Real Use Cases

How professionals leverage LanguageTool - AI Grammar & Style Checker 30+ Languages

Discover practical workflows and real-world scenarios where LanguageTool delivers key solutions.

Non-native English speakers catching grammar and unnatural phrasing before publishing or sending professional writing

Bloggers and content writers running final readability and style checks directly in Google Docs or WordPress

Multilingual teams proofreading communications in Spanish, French, German, or Portuguese with a single tool

Students and academics catching grammatical errors and improving clarity in essays, theses, and research papers

Buyer's guide

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Outwrite

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Free