PDFAITools
LanguageTool
AI-powered grammar and style checker supporting 25+ languages. Available as browser extension, desktop app, and API.
What is LanguageTool?
What is LanguageTool?
LanguageTool is an AI-powered grammar, style, and spell checker that supports over 25 languages. It goes beyond simple spell checking to identify grammatical errors, awkward phrasing, punctuation mistakes, and style issues, making it a comprehensive writing assistant for multilingual users.
Broad Language Support
LanguageTool's most distinctive feature is its genuine multilingual capability. While most grammar checkers focus primarily on English, LanguageTool provides deep grammar checking for German, French, Spanish, Portuguese, and 20+ other languages — making it indispensable for writers working in non-English languages.
- Grammar and style checking in 25+ languages
- Browser extensions for Chrome, Firefox, and Edge
- Desktop apps for Windows and macOS
- API for integration into custom applications
- Microsoft Word and Google Docs add-ons
Key Features
Comprehensive grammar checking across more than 25 languages.
Identifies wordy phrases, passive voice, and style inconsistencies.
Browser extensions, Word add-in, Google Docs, and desktop apps.
Optional local processing mode keeps text on your device.
REST API for integrating grammar checking into custom tools.
Who Uses LanguageTool?
Grammar check documents written in German, French, Spanish, and other languages.
Ensure emails and business documents are grammatically correct.
Catch errors in essays, research papers, and dissertations.
Embed grammar checking into custom writing or document processing tools via API.
Pros & Cons
✅ Pros
- Best grammar checker available for non-English languages
- Free tier is genuinely useful without a subscription
- Available on virtually every platform and editor
- Open-source core available for self-hosting
- Privacy mode option for sensitive documents
❌ Cons
- English quality lags behind Grammarly for advanced style suggestions
- Free tier misses many advanced errors
- Browser extension can slow down older machines
- Some suggestions can be too aggressive or incorrect
LanguageTool Pricing
Free
- Basic grammar checks
- 25+ languages
- Browser extension
- Limited suggestions
Premium
- Advanced style checks
- Picky mode
- Word & Docs add-ins
- Priority support
Team
- All Premium features
- Team management
- Centralized billing
- Admin dashboard
LanguageTool earns a 3.8/5 rating from our editorial team. Its generous free tier lets you explore core features before upgrading, making it a low-risk choice for individuals and teams. Standout strengths include best grammar checker available for non-english languages and free tier is genuinely useful without a subscription.
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