LanguageTool
AI grammar and style checker supporting 30+ languages, with free and Premium plans, real-time suggestions, browser and app integrations, and AI paraphrasing to improve multilingual writing clarity.
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Key Features
Multilingual support
Checks 30+ languages and dialects with language-specific rules and suggestions.
Picky Mode
Advanced punctuation, typography and nuanced style checks for precise editing.
Paraphrasing tool
AI rephrases sentences to adjust tone, fluency, or conciseness quickly.
Integrations
Browser extensions, Google Docs, Word, LibreOffice, desktop and mobile apps.
Custom style guide
Personal dictionary and team style rules to enforce consistent writing.
Real-time checking
Instant suggestions while typing across supported apps and editors.
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Why Choose LanguageTool
Broad language coverage:
Supports over 30 languages and multiple dialects for global writing needs.Open-source flexibility:
Self-hostable community edition and customizable rules for privacy and control.Cost-effective plans:
Lower Premium pricing and team options compared with some competitors.AI enhancements:
Neural-network suggestions and paraphrasing improve accuracy and fluency.
Pricing
Free plan: basic grammar, spelling and style checking (up to 10,000 characters per check). Premium: individual plans (annual $59.90/yr or $4.99/mo billed yearly; $19.90/mo monthly), higher limits and advanced AI features. Teams: from $9.49/mo per user (annual). Prices as of March 2026.
About LanguageTool
AI grammar and style checker supporting 30+ languages, with free and Premium plans, real-time suggestions, browser and app integrations, and AI paraphrasing to improve multilingual writing clarity.
What LanguageTool Does
LanguageTool provides AI grammar, spelling, punctuation, and style checks across 30+ languages, delivering real-time suggestions as you type. It highlights errors, explains issues, and offers AI-driven paraphrases to improve tone, clarity, or conciseness.
The service combines rule-based detection with neural-network enhancements and includes features such as Picky Mode, a personal dictionary, customizable style guides, and integrations for browsers, Google Docs, Microsoft Word, desktop and mobile apps. Premium increases character limits and unlocks advanced AI suggestions.
Use cases include multilingual content editing, academic writing support, team style enforcement, and in-app proofreading for marketing, documentation, and email workflows.
Pros & Cons
Multi-language
Effective support across 30+ languages and dialects.
Easy to use
Fast checker with straightforward integrations and high ease-of-use ratings.
Affordable
Competitive annual Premium pricing compared to some alternatives.
Open-source
Core codebase available for offline use and customization.
Extension paywall
Browser extension access requires a Premium subscription as of Jan 2026.
Free limits
Free tier restricts checks to 10,000 characters per check.
Value concerns
Perceived lower value for money after pricing and feature changes.
Frequently Asked Questions
LanguageTool offers a free tier with limits (10,000 characters per check); Premium unlocks higher limits, advanced AI features, and full app/browser access for subscribers.
LanguageTool supports over 30 languages, including English (multiple dialects), German, Spanish, French, Dutch, Portuguese, Arabic, Chinese, and Russian, with language-specific rules and checks.
LanguageTool's browser extension requires a Premium subscription as of January 2026; developers can use a self-hosted option to retain free extension access.
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