Grammar, Style and Spell Checker

LanguageTool checks your writing in more than 20 languages

Install Google Docs add-on

For example, detects the typo in 'ISBN 978-1784713936' Beispiel: "Sehr geehrte Frau Andreas Müller". →  Das Geschlecht stimmt nicht mit der Anrede überein. 'Andreas' ist üblicherweise ein männlicher Vorname. English example: Man returns wallet he fount. → found
Deutsches Beispiel: Der nächste Schrott zum Klassenerhalt ist getan. → Schritt Some examples:

English:

  • Create two strips with an event amount of wax on each strip. → even
  • I'm kinder bored. → kind of
  • I don’t the answer. → verb missing

Deutsch:

  • Da Auto fährt schnell. → Das
  • An machen Stellen könnte es eng werden. → manchen
  • Ich kann ein Häuschen mit Garten mein eigen nennen. → Eigen
 input: text, output: JSON with the detected error

Reviews

  • This application has helped me a lot. Thank you for this fine tool! (Cosmonaut Rico)
  • I love LanguageTool! I have been using it in LibreOffice for years. It's the best. (Scott Harpster)
  • Finally, it is a good grammar checker, catching a decent range of agreement errors and style weaknesses. I've been a paid user for two months now and I'm very pleased with it. (Tim Richardson)

Pricing

Free

20,000 characters per check

languagetool.org

  • More than 1700 patterns for finding errors (English)
  • More than 2400 patterns for finding errors (German)
  • Add-on for Microsoft Word (more...) - no character limit
  • Detection of wrong gender in salutation (German only)
  • Additional word pairs for statistical detection of typos for English and German
  • Detection of incorrect checksums in ISBN and IBAN numbers
  • Detection of more than 1000 other additional errors for English, German, and French

Premium

40,000 characters per check

languagetoolplus.com

  • More than 1700 patterns for finding errors (English)
  • More than 2400 patterns for finding errors (German)
  • Add-on for Microsoft Word (more...) - no character limit
  • Detection of wrong gender in salutation (German only)
  • Additional word pairs for statistical detection of typos for English and German
  • Detection of incorrect checksums in ISBN and IBAN numbers
  • Detection of more than 1000 other additional errors for English, German, and French
  • API access
/month
/year
all prices incl. VAT
For students, authors, freelancers

Enterprise

40,000+ characters per check

languagetoolplus.com

  • More than 1700 patterns for finding errors (English)
  • More than 2400 patterns for finding errors (German)
  • Add-on for Microsoft Word (more...) - no character limit
  • Detection of wrong gender in salutation (German only)
  • Additional word pairs for statistical detection of typos for English and German
  • Detection of incorrect checksums in ISBN and IBAN numbers
  • Detection of more than 1000 other additional errors for English, German, and French
  • API access - also available as an on-premise solution


A good fit for companies, agencies, publishing houses

Add-on for Firefox and Chrome

LanguageTool also works in your browser - check the text you enter in text fields, or check selected text on websites.

Install for Firefox Install for Chrome

Add-on for Google Docs

Use LanguageTool directly in Google Docs.

Add-on for Microsoft Word

We offer an add-on for Microsoft Word 2016 or later. Works on Windows, Mac, and Word Online.

  • Step 1

    With the help of the Microsoft Word add-in you can use languagetoolplus.com directly in Word. After installing the add-in, you will see the “LT” icon on the “Home” tab.

  • Step 2

    Use your languagetoolplus.com account to log in.

  • Step 3

    Select whether you want to check a paragraph or the whole document.

  • Step 4

    In the list of possible errors, click a correction and it will be applied to your text.

Add-on for LibreOffice

Requires Java 8 or later · Problems? Look here for help

Use Tools → Extension Manager → Add… in LibreOffice/OpenOffice to install this file. Then restart LibreOffice/OpenOffice (including quickstarter).

More Add-ons

Our community has developed add-ons and plugins for many programs.

Desktop version for offline use

LanguageTool can be downloaded for offline use. Note: this requires Java 8 or later to be installed and unless you install additional data, this will be less powerful than the version on this website. See this comparison table.

After download, unzip the file and start languagetool.jar by double clicking it.

Other Downloads: Old releases · Daily builds

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Some of the companies that use LanguageTool

License & Source Code

LanguageTool is freely available under the LGPL 2.1 or later. The source is available on github.

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