Instant Grammar and Comma Checker

Correct punctuation mistakes in English and over 30 other languages—for free. Simply paste your text below to detect missing commas and grammar errors.

Made with ♥ in Germany

Spain, France, UK, the Netherlands and more

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

Try the LanguageTool Editor for a Better Writing Experience

Create your free account

Works With All Your Favorite Services

LanguageTool works in your browser and many other tools you use to write your texts. Install it today and get grammar as well as style suggestions wherever you write.

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.

Read more
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.

Read more
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.

Read more
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.

Read more
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.

Read more

In a Nutshell

✅  Correction Grammar, spelling & style
👓  Punctuation Detects missing commas
🌎  Multilingual English, Spanish…
🎁  Free No sign-up required

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.

Learn more