LanguageTool
Style and Grammar Checker for Over 25 Languages
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is LanguageTool?
LanguageTool is an open-source grammar and style checker that supports over 25 languages. It helps users improve their writing by identifying grammatical errors, stylistic issues, and inconsistencies.
Key differentiator
“LanguageTool stands out as a comprehensive, open-source solution for multilingual grammar and style checking, offering broad language support and flexibility in integration.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
LanguageTool can be slow when checking long texts, leading to delays in feedback
Requires Java environment and configuration of multiple dependencies to integrate effectively with non-Java projects
Some less commonly supported languages may have fewer rules and lower accuracy compared to major languages like English or German
Fit analysis
Who is it for?
✓ Best for
Teams needing multilingual grammar and style checking capabilities
Individuals who write frequently in multiple languages and require consistent feedback on their writing quality
✕ Not a fit for
Projects requiring real-time text correction with low latency requirements
Applications that need highly specialized linguistic analysis beyond basic grammar and style checks
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Next step
Get Started with LanguageTool
Step-by-step setup guide with code examples and common gotchas.