Last updated 08-15-2026
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LanguageTool
LanguageTool checks grammar, spelling, punctuation, and style in more than 30 languages through a web editor and browser extensions. Paste or type text to get underlined suggestions for subject-verb agreement, comma placement, word choice, and casing, plus a paraphrasing mode that rewrites sentences to be more formal or concise.
Compared with built-in spell checkers that catch typos only, LanguageTool adds over 20,000 extra style and grammar rules on Premium for English, German, French, Spanish, Dutch, Polish, and Portuguese. Picky Mode pushes even further on advanced punctuation and typography, and Premium raises the per-field character limit to 150,000 for long articles or emails.
Writers, students, and teams use LanguageTool inside Chrome, Firefox, Safari, Edge, Google Docs, Microsoft Word, LibreOffice, Slack, and macOS apps. The free Basic tier covers core grammar checks, while Premium and Team plans add shared style guides, team dictionaries, and unlimited AI paraphrasing.
Checks grammar and spelling in 30+ languages with automatic language detection
Premium adds 20,000+ extra checks for English, German, French, Spanish, Dutch, Polish, and Portuguese
Browser extensions for Chrome, Firefox, Safari, Edge, and Opera with 4M+ Chrome users
Premium supports up to 150,000 characters per text field
AI paraphrasing rewrites sentences to be more formal, fluid, or shorter
Supports 30+ languages with automatic detection
Works across browsers, Google Docs, Word, LibreOffice, and Slack
Trusted by over 4 million Chrome extension users
Free Basic tier covers everyday grammar and spelling
Premium Picky Mode catches advanced punctuation and style issues
Premium pricing was not displayed on the pricing page during research
Most advanced checks require a paid Premium or Team subscription
Team plan needed for shared style guides across multiple writers
Is LanguageTool free?
Yes, LanguageTool offers a free Basic plan with core grammar and punctuation checking. LanguageTool Premium adds advanced style rules, Picky Mode, higher character limits, and unlimited AI paraphrasing.
How many languages does LanguageTool support?
LanguageTool supports more than 30 languages and dialects with automatic detection. LanguageTool Premium includes over 20,000 additional checks focused on English, German, French, Spanish, Dutch, Polish, and Portuguese.
Does LanguageTool work in Google Docs and Word?
Yes, LanguageTool integrates with Google Docs through its browser extension and offers dedicated apps for Microsoft Word on Windows and Mac. LanguageTool also works in LibreOffice, Outlook, Slack, and Apple Pages.
What is LanguageTool Picky Mode?
LanguageTool Picky Mode enables advanced punctuation, style, and typography suggestions beyond the standard checker. LanguageTool includes Picky Mode on Premium plans for writers who want stricter feedback.
What is the LanguageTool character limit on Premium?
LanguageTool Premium allows up to 150,000 characters per text field. LanguageTool designed this limit for long blog posts, reports, and extended emails that exceed the free tier cap.
Does LanguageTool have a team plan?
Yes, LanguageTool offers a Team plan with shared style guides, a team dictionary, and user management for 2 to 1,000 members. LanguageTool Teams includes all Premium features for every seat on the account.