LanguageTooler
LanguageTool
An open-source grammar checker supporting 30 languages
◐Free plan ✕No Korean
Last verified:
Key specs
| Price | ◐Free plan |
|---|---|
| Free limits | Up to 2,000 characters per check (150,000 for Premium) |
| Paid price | Premium approx. $5/month (annual billing) |
| Student / edu discount | Educational discounts available |
| Korean | ✕NoneKorean not supported. Partial Korean UI. |
| Login | Not needed |
| Platforms | Web · Browser extension · Windows · macOS · iOS · Android |
| File input | DOCX, TXT |
| Download output | Copy results |
| Commercial use | ConditionalOpen-source core (LGPL). Check terms of service for the cloud service. |
Prices may change. Currency and billing period follow the official listing; no currency conversion. Pricing page (opens in a new tab)
Who it's for
- Anyone who needs to proofread text in German, French, or Spanish alongside English. It supports 30 languages.
- People who want to use a free grammar checker without signing up. Just paste your text into the web editor.
- Organizations that prefer open-source software or want to host a grammar checker on their own server to keep data strictly internal.
Drawbacks
- Korean is not supported. For Korean text, you need to use Bareun or the Pusan National University spell checker separately.
- English style and clarity suggestions are simpler than Grammarly's. It pinpoints errors rather than rewriting entire sentences.
- The free plan has limits on the number of characters per check and restricts some advanced rules.
Getting started
- Paste your text into the official website for an instant check. No login is required.
- Click the underlined errors to accept the suggestions.
- Install the browser extension to check your writing in real-time across emails and documents.
- The language is detected automatically, but you can manually select it if your text contains mixed languages.
- For corporate use, consider the self-hosted (open-source) server option to keep data completely on-premises.
Similar tools
- Grammarly ◐Free plan Grammarly offers detailed English style suggestions, while LanguageTool supports more languages and has a generous free tier.
- DeepL ◐Free plan DeepL focuses primarily on translation with proofreading as an extra, while LanguageTool is a dedicated grammar checker.
- Bareun Spell Checker ✓Free Bareun is exclusively for Korean, whereas LanguageTool does not support Korean.
See also
- Comparison: Best 4 AI English Grammar Checkers Compared (Free Included)
- Use: Writing, editing & translation
- Prompts: english-email
- Concepts: grammar-check , open-source
Official link
https://languagetool.org/ (opens in a new tab)
Not an affiliate link. Spotted an error? Suggest a fix.