LanguageTool
Proofread more than 20 languages. It finds many errors that a simple spell checker cannot detect.
- Utilities
- Java
- LGPL-2.1
- Docker
- Actively maintained
GitHub stats
- GitHub stars
- 15,107
- Forks
- 1,584
- Open issues
- 2,105
- Commits, last 12 months
- 1,930
- Last commit
- Oct 6, 2026
- Latest release
- No releases
- Created
- Aug 8, 2013
Data from the GitHub API, refreshed daily.
About LanguageTool
Proofread more than 20 languages. It finds many errors that a simple spell checker cannot detect. LanguageTool is open source under the LGPL-2.1 license and written mainly in Java, so you can read the code, run it on your own hardware and keep full control of your data.
The project has 15,107 stars and 1,584 forks on GitHub, with 1,930 commits over the last year. It ships a Docker image, which makes it a good fit for a small VPS or a home server running Docker Compose.
Topics
- grammar
- natural-language
- natural-language-processing
- style-checker
- proofreading
- spellcheck
Repository preview
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What is LanguageTool?
LanguageTool is a free, open-source app you can host on your own server, listed in our Utilities category. Proofread more than 20 languages. It finds many errors that a simple spell checker cannot detect. The source code lives at github.com/languagetool-org/languagetool, where it has 15,107 stars.
Is LanguageTool free and open source?
Yes. LanguageTool is open-source software released under the LGPL-2.1 license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan.
Can I run LanguageTool with Docker?
Yes. LanguageTool provides a Docker image, so you can run it on any Linux server with Docker and Docker Compose installed. The project README lists the image name and the environment variables to set.
What are the best alternatives to LanguageTool?
Popular open-source alternatives to LanguageTool include Excalidraw, revealjs and penpot.
Is LanguageTool actively maintained?
The most recent commit to LanguageTool was on Oct 6, 2026 with 1,930 commits in the past twelve months. Check the open issues on GitHub to gauge how quickly maintainers respond.