What is LanguageTool?
LanguageTool is not just a grammar checker—it’s an intelligent writing-assistance platform designed for global users. It has been adopted by over 2,000 organizations worldwide, including the European Union, Der Spiegel, Deutsche Presse-Agentur (dpa), Deezer, TÜV Süd, ANP, Heise, Max-Planck-Gesellschaft, Blinkist, SRF, Kronen Zeitung, JetBrains, and IP Australia. Trusted by more than 4 million users globally, it boasts over 10,000 reviews for its Chrome extension and more than 1,250 reviews for its Firefox add-on, making it one of the highest-rated and most widely used grammar-checking extensions across Chrome, Firefox, Edge, Safari, and Opera.
Key features
It offers a “Picky Mode” that enhances detection and provides detailed suggestions for advanced punctuation, stylistic issues, and formatting problems. It also supports automatic language recognition, offering real-time optimization tips when composing emails, blogs, or tweets, while its browser extension ensures no text is stored to protect user privacy.
Built-in personal dictionaries and analytics allow users to track writing productivity, language distribution, error types, and the number of accepted suggestions, helping them intuitively assess improvements in their writing skills. The interface also supports switching between dark and light modes, along with secure text storage.
Use cases and audience
Ideal for university and graduate students—especially those writing dissertations—multilingual content creators, journalists and editors (such as Spiegel Magazine and dpa users), corporate office workers (adopted by over 2,000 organizations), educational institutions, and publishing industry professionals.
- When writing academic papers—such as bachelor’s or master’s theses—use this tool to check grammar, spelling, and punctuation errors, ensuring your text is flawless.
- Automatically identify the language in multilingual writing scenarios and provide cross-language grammar and spelling checks, supporting over 30 languages and dialects including English, German, Spanish, and more.
- Receive real-time writing suggestions while composing emails, blog posts, or social media updates, enhancing accuracy and professionalism.
The tool accepts any natural-language text input, supporting more than 30 languages and dialects, including English, German, Portuguese, Spanish, French, Dutch, and others. It handles various formats such as plain text, emails, blog posts, social media snippets, and academic documents.
It identifies errors in grammar, spelling, punctuation (including commas), and capitalization (for names, months, place names, and nationalities), providing actionable revision suggestions. The Premium version additionally delivers style enhancements, layout guidance, and writing statistics—such as language distribution, error categories, and suggestion adoption rates.
Frequently asked questions
Is LanguageTool free?
LanguageTool offers a free version that can correct spelling, basic punctuation, and some stylistic errors; full error detection and optimal text suggestions require a Premium subscription. Team and enterprise accounts are also available as optional plans.
How does LanguageTool detect punctuation errors such as commas?
LanguageTool’s punctuation checker can distinguish between essential and optional commas, supports analysis of complex sentence structures, and accurately identifies and corrects comma misuse issues.
How to use
- 01
Visit languagetool.org, click “Open Editor” or “Sign Up” to create a free account.
- 02
Paste your text into the editor or type directly; LanguageTool will automatically detect the language and highlight errors.
- 03
Enable “Picky Mode” for stricter punctuation, style, and formatting recommendations (a Premium feature).
- 04
Install the browser extension (for Chrome/Firefox/Edge/Safari) or the desktop app (for Windows/macOS) to perform real-time checks within popular tools like Outlook, Word, and Google Docs.
Pricing and availability
The free version supports basic grammar, spelling, and simple punctuation checks; the Premium version provides comprehensive error detection, advanced style and layout recommendations, Picky Mode, and statistical features. The official website currently lists a limited-time 20% discount; students can enjoy exclusive offers. There is no explicit mention of word or character limits, nor any details regarding monthly or annual payment cycles.
- Pricing source
- https://languagetool.org/
- Pricing last updated
- 2026-10-29
Prices and limits may change. Check the official website for current terms.
Official website & sources
Updated on 2026-10-29
