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LanguageTool

Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.

Open Source Alternative to:

Grammarly

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14,997stars+214(+1.4%)

Last 30 days

Last commit
18 hours ago
Repository age
13 years
License
LGPL-2.1
Self-hosted
Yes
Repository
languagetool-org/languagetool

Self-host in 3 steps

1
Start a KVM 2 VPS on Hostinger
Recommended plan for one-click apps.
2
Apply code
10% off any 12-month plan at checkout.
3
Deploy LanguageTool
With Hostinger's one-click installer.

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Advanced AI-powered grammar checking that goes beyond basic spell check to provide comprehensive writing assistance across 30+ languages and dialects. Trusted by over 2000 organizations including BMW Group, European Union, and JetBrains.

Key features include:

Real-time grammar and punctuation correction with intelligent suggestions
Multi-language support with automatic language detection
Style and tone improvements to enhance writing quality
Paraphrasing tool powered by artificial intelligence
Browser extensions for Chrome, Firefox, Safari, Edge, and Opera
Desktop applications for Windows and macOS
Office integrations for Microsoft Word, LibreOffice, and Google Docs

The platform offers both free and premium versions, with the free tier handling basic grammar and spelling errors, while premium provides advanced style suggestions, punctuation refinement, and enhanced error detection. Privacy-focused design ensures no text is stored by browser extensions.

Perfect for students, professionals, and organizations requiring error-free, polished writing across multiple languages and platforms.

Categories:

Browser Extensions Productivity & Utilities