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About
LanguageTool is a comprehensive AI-powered writing assistant that goes far beyond simple spell-checking. It analyzes text for grammatical errors, spelling mistakes, punctuation issues, and stylistic improvements across more than 30 languages and dialects—including English, German, Spanish, French, Portuguese, and Dutch. Available as a web editor, browser extensions for Chrome, Firefox, Edge, Safari, and Opera, as well as plugins for Google Docs, Microsoft Word, Apple Pages, LibreOffice, Gmail, and Outlook, LanguageTool delivers real-time writing assistance wherever you work. The built-in Paraphrasing Tool allows users to rephrase sentences and paragraphs to improve clarity, adjust tone, or avoid repetition. A dedicated Statistics feature tracks writing productivity, language usage, and error patterns over time, helping users measure their improvement. The premium 'Picky Mode' unlocks advanced suggestions for typography and style, while the GDPR-compliant Proofreading API enables businesses and developers to integrate professional-grade proofreading into their own workflows. Trusted by over 2,000 organizations worldwide—including BMW, JetBrains, and Blinkist—LanguageTool is the go-to writing tool for students, content creators, non-native speakers, and enterprise teams seeking polished, error-free communication at scale.
Key Features
- Multilingual Grammar & Spell Checking: Detects grammar, spelling, and punctuation errors across 30+ languages and dialects, making it ideal for multilingual writers and non-native speakers.
- AI-Powered Paraphrasing Tool: Rephrase sentences and paragraphs to improve clarity, adjust tone, and eliminate repetition using advanced language models.
- Universal Integrations: Works as browser extensions for Chrome, Firefox, Edge, Safari, and Opera, plus plugins for Google Docs, Microsoft Word, Gmail, Outlook, and more.
- Writing Statistics & Progress Tracking: Tracks productivity, language usage, and error trends over time so users can measure their improvement as writers.
- Proofreading API for Businesses: A GDPR-compliant API that lets businesses and developers integrate professional proofreading capabilities into their own applications and workflows.
Use Cases
- Students proofreading academic papers and essays to catch grammar and style errors before submission
- Non-native speakers checking their writing for correctness, natural phrasing, and fluency
- Content creators and bloggers polishing articles, newsletters, and social media posts across multiple languages
- Businesses ensuring consistent, error-free communication across emails, reports, and marketing materials
- Developers integrating professional proofreading capabilities into their applications via the LanguageTool API
Pros
- Widest Language Coverage: Supports 30+ languages and dialects, far surpassing most grammar checkers that focus primarily on English.
- Works Everywhere You Write: Browser extensions, office suite plugins, and email client add-ons deliver grammar assistance across every writing environment.
- Privacy-Friendly Design: The browser add-on stores no text locally, and the API is GDPR-compliant, making it suitable for sensitive professional content.
- Trusted at Enterprise Scale: Used by 2,000+ organizations including BMW, Blinkist, and JetBrains, demonstrating reliability for high-volume professional use.
Cons
- Advanced Features Locked Behind Premium: Picky Mode, advanced style suggestions, and unlimited paraphrasing require a paid subscription to access.
- Context Comprehension Limits: May miss contextual or domain-specific errors and occasionally suggest incorrect changes in complex or technical writing.
- Free Tier Restrictions: The free version imposes limits on text length and the number of suggestions per check, which can feel restrictive for heavy users.
Frequently Asked Questions
Is LanguageTool free to use?
Yes, LanguageTool offers a free tier with basic grammar and spelling checks. A Premium subscription unlocks advanced style suggestions, Picky Mode, unlimited paraphrasing, and more.
Which languages does LanguageTool support?
LanguageTool supports more than 30 languages and dialects, including English, German, Spanish, French, Portuguese, Dutch, and many others.
Does LanguageTool store my text?
The browser add-on does not store any text in order to protect your privacy. Texts saved in the online editor are securely stored within your account.
Can I use LanguageTool inside Microsoft Word or Google Docs?
Yes, LanguageTool offers dedicated plugins for Microsoft Word, Google Docs, Apple Pages, and LibreOffice so you can check your writing without leaving your editor.
Is there an API available for developers or businesses?
Yes, LanguageTool provides a GDPR-compliant Proofreading API that businesses and developers can integrate into custom applications, content platforms, and enterprise workflows.
