More than a Grammar Checker Grammar Checker & Paraphraser

LanguageTool is an AI-based spelling, style, and grammar checker that helps correct or paraphrase texts across languages.

2000+ organizations trust our AI-based grammar checker and paraphraser

  • BMW Group
  • European Union
  • Spiegel Magazine
  • Deutsche Presse-Agentur (dpa)
  • Deezer
  • Algemeen Nederlands Persbureau (ANP)
  • Heise
  • Max-Planck-Gesellschaft
  • Blinkist
  • Bertelsmann Stiftung
  • Schweizer Radio und Fernsehen (SRF)
  • JetBrains
  • IP Australia

Try the LanguageTool Editor for a Better Writing Experience

Create your free account

Our Browser Add-On Works Anywhere on the Web

Receive tips on how to improve your text while typing an e-mail, a blog post, or just a simple tweet. Whatever language you’re using, LanguageTool will automatically detect it and provide suggestions. To respect your privacy, no text is stored by the browser add-on.

Best-rated grammar checker for Microsoft Edge

Over 1 million users trust LanguageTool with their writing

Most popular writing add-on for Opera
Most popular writing add-on for Yandex
1,250+ Firefox add-on reviews

Top-rated grammar checker for Firefox with over 1 million users

Best-rated grammar checker for Safari

Over 4 million users trust LanguageTool with their writing

10,000+ Chrome Store reviews

Top-rated grammar checker for Chrome with over 3 million users

Do you speak a foreign language?

The Most International Writing Tool

There are over 7,000 languages and various multilingual countries in the world. LanguageTool helps as an international spellchecker and paraphraser in several languages, including:

+ more than 30 other languages and dialects

Reach Your Potential With Statistics

This feature helps you stay consistent with your writing by tracking your productivity. It also provides an overview of languages used, errors made, and suggestions applied, so you can see for yourself how your writing skills have improved.

Elevate Your Writing With the Grammar, Spell, and Style Checker for Windows

Experience LanguageTool’s advanced spelling, style, and grammar suggestions right in all your favorite writing apps.

Supported Apps

Elevate Your Writing With the Grammar, Spell, and Style Checker for macOS

Experience LanguageTool’s advanced spelling, style, and grammar suggestions right in all your favorite writing apps.

Supported Apps

Integrates With Your Favorite Office Program

Get the best out of your docs and deliver error-free results, whether you’re working on a dissertation, essay, book, or you just want to note something down.

Text checking for LibreOffice & OpenOffice

* LanguageTool’s grammar check for OpenOffice requires Java 8. Currently not available for the Premium version. Problems installing it? Look here for help: Troubleshooting

Correct Spelling

Do you fall victim to typos and misspellings way too often? LanguageTool finds every mistake and underlines it in red. Spell every name, phrase, and word the write… eh, the right way!

Correct Spelling

Check Grammar

Grammar rules have never been so easy! LanguageTool will help rid your writing of all grammar gaffes, like incorrect subject-verb-agreement, wrong plural forms, or misuse of grammatical forms.

Check Grammar

Fix Punctuation

Commas and dashes and hyphens… Proper punctuation can be tricky—LanguageTool ensures you’re using them right. It can even help you form complex sentences and tell you when you’ve used too many exclamation points!

Fix Punctuation

Confirm Casing

It’s all about the capital, right? And the lowercase letters, too. LanguageTool corrects incorrect casing, whether you’re writing capitalized names, months, places, or national identities.

Confirm Casing

Improve Style

LanguageTool helps your writing be as stylish as you are by detecting overused phrases, foreign terms, redundant words, and improper word choice. All you have to do to find the best style is look out for the blue underline.

Improve Style


Looking for the right words? LanguageTool's paraphraser makes them easier to find by using artificial intelligence to rephrase your sentences to be more formal, fluent, simple or concise.

Paraphrase Text Read more

What else?

Frequently Asked Questions

Make your text sound professional and avoid embarrassing style, punctuation, and grammar mistakes

Does LanguageTool only include spelling correction?

LanguageTool corrects spelling mistakes, but it also offers a full writing analysis of all possible texts. In addition to spelling, grammar, and word choice, language style is also corrected.

How well does LanguageTool detect comma errors?

Punctuation errors of all kinds are found and corrected by LanguageTool. Its correction distinguishes between optional and required commas. Even complex sentence structures can be proofread by the comma check.

How does error detection and correction by LanguageTool work?

The error display and suggestion cards are shown automatically and directly while typing. This means that texts can be checked and corrected in just a few moments. To see synonyms, simply double-click on any word.

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Which languages can be checked with LanguageTool?

LanguageTool masters more than 30 languages and dialects. Its main languages are English, Spanish, German, French, Dutch, and Portuguese. In its English version, you can choose between six standard varieties (US, UK, Canada, Australia, New Zealand, and South Africa).

Is LanguageTool free?

LanguageTool is available in two versions. The free version corrects spelling as well as simple punctuation and some style mistakes. Only the Premium version will show you all errors and give you the best possible text. Team accounts for companies are also available.

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Does LanguageTool work on my program?

LanguageTool is not bound to a specific program or website. There are several extensions and add-ons available, so it can be used in all common internet browsers. In addition, you can find a dedicated text editor as an app for iOS, macOS (Apple), and Windows. All you need is just one user account.

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Is LanguageTool suitable for paraphrasing sentences?

LanguageTool now offers an A.I.-based paraphraser in addition to correction. This can help you to rewrite entire sentences to make them simpler, shorter, or more formal.

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Can LanguageTool help me correct a bachelor or master thesis?

If you have to write a term paper, bachelor thesis or master thesis at a university, LanguageTool can help you to be sure that it is free of errors. The writing assistant’s style check is also particularly helpful for other academic texts in schools or at publishing houses. By the way, students get a discount for LanguageTool.

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Unleash the professional writer in you with LanguageTool Premium

Go well beyond grammar and spell checking, and impress with clear, precise and stylistically correct writing.

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