LanguageTool
Open-source grammar and style checker
FreeContent WritingOpen Source1 impressions
LanguageTool is an AI-powered grammar, spelling and style checker for over 30 languages.
- for
- Writers, students, professionals and teams needing multilingual text correction.
- pricing
- freemium · free trial
- license
- LGPL-2.1
Key features
- Grammar & punctuation checking — Detects and corrects grammar, punctuation and agreement errors in real time.
- Style and tone suggestions — Highlights overused words, informal language and offers style improvements.
- AI paraphrasing — Rewrites sentences to be more formal, concise or fluent using AI.
- Personal dictionary & statistics — Save custom words and track writing productivity and error trends.
- Browser extensions & add-ons — Works in Chrome, Firefox, Edge, Safari, Opera and integrates with Google Docs, Word and LibreOffice.
- Desktop & mobile apps — Native editors for Windows, macOS and iOS with offline checking.
Use cases
- Proofreading academic papers and theses
- Polishing business emails and client communications
- Ensuring consistent brand voice across team documents
- Improving multilingual blog posts and marketing copy
- Rephrasing sentences for clarity and brevity
LanguageTool pricing
- 2-year Premium$119.80/2 years/2 years$4.99 per month equivalent · Up to 150,000 characters per check · Unlimited AI paraphrasing · Custom style guide
- Annual Premium$69.90/year/year$5.83 per month · 150,000 character limit · AI paraphrasing · Team style guide
- Quarterly Premium$49.90/quarter/quarter$16.63 per month · 150,000 character limit · AI paraphrasing · Custom rules
- Monthly Premium$24.90/month$5.83 per month · 150,000 character limit · AI paraphrasing · Custom style guide
LanguageTool vs alternatives
 LanguageTool |  Grammarly |  Substack | |
|---|---|---|---|
| Best for | Multilingual AI grammar checking | English-centric AI writing assistance | Newsletter creation |
| Pricing | Freemium | Subscription | Subscription |
| DevHunt upvotes | 0 | 0 | 0 |
| Launched | — | — | — |
- LanguageTool vs Grammarly: Offers similar AI grammar checking but focuses mainly on English and fewer language options.
- LanguageTool vs Substack: A publishing platform rather than a grammar checker; not a direct competitor.
LanguageTool FAQ
Can I try LanguageTool Premium for free?+
Yes, there is a 14-day money-back guarantee; you can cancel anytime for a full refund.
What payment methods are accepted?+
PayPal and credit cards are supported, with more methods planned.
Is my text stored when using the browser add-on?+
Texts are not stored by the add-on; only the web editor saves texts for the logged-in user.
Can a Premium subscription be used on multiple devices?+
Yes, you can log in to all LanguageTool apps and extensions with the same account.
How does LanguageTool differ from built-in spellcheckers?+
It provides advanced grammar, punctuation and style checks beyond basic spellchecking.
Summarized by DevHunt from languagetool.org · Oct 7, 2026. Details may change; check the official site.
About this listing
DevHunt lists LanguageTool because developers expect to find it next to the tools in its category. It did not launch on DevHunt. Work on LanguageTool? Message us to claim this listing.
