• Finds many errors that a simple spell checker cannot detect
• No registration needed
• Supports more than 25 languages (see below)
• Works on almost any website including Gmail, Facebook, Twitter
• No text is stored to ensure full privacy

With this extension you can check text with the free style and grammar checker LanguageTool. LanguageTool finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word, and it can detect some grammar problems. It supports more than 25 languages, including English, Spanish, French, German, Polish, and Russian.

LanguageTool is designed with simplicity in mind. It instantly checks the spelling and grammar of any text in the current text field. LanguageTool is compatible with almost all text, regardless of source, including social networks such as Twitter or LinkedIn and online e-mail services, such as Gmail. Very few sites like currently aren't supported.

With LanguageTool, our aim is to give users a fully-featured grammar checker and proofreader that will enable them to have control and confidence over their content. While LanguageTool is a vital extension for non-native speakers, it’s also smart enough to recognize many mistakes that native speakers commonly make. This grammar and spelling correction works across all variations of common language; distinguishing between U.S. and British English, for instance. LanguageTool also features a personal dictionary for exceptions or words that you might commonly use but that are not found in a conventional dictionary. LanguageTool will recognize these words in future grammar checking and proofreading.

LanguageTool works for many languages - unlike Grammarly (a.k.a. Grammerly :-), Ginger, and ProWritingAid.

Your privacy is important to us: By default, this extension will check your text by sending it to over a securely encrypted connection. No account is needed to use this extension. We don't store your IP address. See for our privacy policy and for our terms of use.

Please send bug reports or questions to

List of supported languages: English (Australian, Canadian, GB, New Zealand, South African, US), French, German (Austria, Germany, Swiss), Asturian, Belarusian, Breton, Catalan (also Valencian), Chinese, Danish, Dutch, Esperanto, Galician, Greek, Italian, Japanese, Khmer, Persian, Polish, Portuguese (Brazil, Portugal, Angola, Mozambique), Romanian, Russian, Slovak, Slovenian, Spanish, Swedish, Tagalog, Tamil, Ukrainian, Arabic

What’s New

Version 3.3.17

## NEW
With this release, the LanguageTool Editor is coming to the Mac. Write and store your texts in a distraction-free environment.

• Define a custom shortcut to open any text in your clipboard directly in the LanguageTool Editor
• Open LanguageTool automatically on system launch so your texts are always just one click away
• Open new texts from the toolbar of your Mac
• Open texts from any application using the sharing menu
• One-time login: Login once with your LanguageTool Account and use your personal dictionary in both the Safari extension and Mac app.


• Small improvements to the Safari extension
• LanguageTool for Mac now also comes in French and Spanish
• Fixes a small bug that occurred when using Gmail in Safari

Ratings and Reviews

5.0 out of 5
3 Ratings

3 Ratings

Heallz ,

The best grammar option for multi language

I Tried this extension in Chrome, and now on safari it's pretty useful if you write in multiple languages and want to have a clean grammar. Their dictionary is pretty good. Also the UX is very nice. I hope you keep improving this Safari version.

Joseph Christodoulos ,

¡Una aplicación excelente!

Soy estudiante de derecho, en cada trabajo uso esta aplicación, de la cual la recomiendo sin tener dudas.
He aprendido a mejorar mi español y llevarlo a un nivel superior gracias a LT en mi MacBook.

App Privacy

The developer, LanguageTooler GmbH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • User Content
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.