LanguageTool
LanguageTool is an AI-based grammar, spelling and style checker for many languages, available in a web editor, browser add-on and with a Premium tier.
About this tool
LanguageTool checks grammar, spelling and style in many languages, automatically detecting the language you write in. It works in a web editor where you can paste or type text, and through a browser add-on that gives suggestions while you write emails, blog posts or social posts. The company says more than 2,000 organisations use its tools.
The Premium plan adds over 20,000 extra checks for English, French, German, Spanish, Portuguese, Dutch and Polish, a Picky Mode for advanced punctuation, style and typography, longer texts, AI paraphrasing to make sentences more formal, fluent or concise, and style guides that enforce consistent terminology across a team’s writing.
What you can do
Multilingual checking
Detects your language and checks grammar, spelling and punctuation accordingly.
Browser add-on
Suggests improvements while you type on websites, email and social platforms.
AI paraphrasing
Rewrites sentences to be more formal, fluent or shorter on Premium.
Style guide
Custom rules keep wording consistent across a team’s documents.
Who is it for?
- A bilingual professional checks emails in both French and English.
- A marketing team enforces product terminology with a shared style guide.
- A student polishes a long essay in the web editor before submission.
Before you choose
The most advanced checks are available for a subset of languages; verify coverage for yours.
Some organisations may prefer self-hosted or enterprise options for confidential text; check data handling.
Frequently asked questions
Is LanguageTool free?
Yes. LanguageTool offers a free grammar checker. Premium adds thousands of extra checks, longer texts, paraphrasing and style guides.
Which languages does LanguageTool support?
It checks many languages and detects them automatically. Premium’s extra checks cover English, French, German, Spanish, Portuguese, Dutch and Polish.
Does LanguageTool work in my browser?
Yes. A browser add-on offers suggestions while you write on websites, in email and on social platforms.
Check the official website for current features, pricing, and terms.
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