LanguageTool
Proofread more than 20 languages. It finds many errors that a simple spell checker cannot detect.
- GitHub stars
- 15,125
- License
- LGPL-2.1
- Last commit
- 12 October 2026
- Runs on
- Java, Docker
Commits per month, last 12 months
1,969 commits
How to self-host LanguageTool
LanguageTool runs on Java and Docker. The project's own install guide is the place to start; most people put it on a small server with Docker and a reverse proxy for HTTPS.
- Get a server: a home server, a VPS, or a managed app host.
- Install it the way the project's docs describe, usually with Docker Compose.
- Put it behind HTTPS and set up backups before you add real data.
- Update it regularly. Watch the project's releases.
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Questions
Is LanguageTool free?
Yes. LanguageTool is open source under the LGPL-2.1 license, so you can use it without paying for a license. You pay only for the server it runs on.
Can I self-host LanguageTool?
Yes. LanguageTool runs on Java and Docker. Follow the install guide in the project's documentation, or use a host that installs it for you.
Is LanguageTool still maintained?
The last change to LanguageTool's code was on 12 October 2026, with 1969 commits in the last 12 months.
Topics
App data from awesome-selfhosted (CC BY-SA 3.0), stars and activity from GitHub.