languagetool-org/languagetool
Style and Grammar Checker for 25+ Languages
Detects complex errors beyond spelling (agreement, collocation, and style issues) through rule-based pattern matching and machine learning models. Exposes functionality via HTTP API, Java library, and standalone server deployments, with community Docker images available for quick containerization. Supports extensible rule contributions and integrates with LibreOffice/OpenOffice via plugin architecture.
14,182 stars. Actively maintained with 153 commits in the last 30 days.
Stars
14,182
Forks
1,490
Language
Java
License
LGPL-2.1
Category
Last pushed
Mar 18, 2026
Commits (30d)
153
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