For example, detects the typo in 'ISBN 978-1784713936' Detects errors like 'Sehr geehrte Frau Andreas Müller' For example, suggests 'found' in 'Man returns wallet he fount.' Some examples:
  • 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
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

<20000 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...)
  • Detection of wrong gender in salutation (German only)
  • Additional word pairs for statistical detection of typos
  • Detection of incorrect checksums in ISBN and IBAN numbers
  • Detection of more than 75 other additional errors
  • API access

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...)
  • Detection of wrong gender in salutation (German only)
  • Additional word pairs for statistical detection of typos
  • Detection of incorrect checksums in ISBN and IBAN numbers
  • Detection of more than 75 other additional errors
  • API access

less than €5/month
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...)
  • Detection of wrong gender in salutation (German only)
  • Additional word pairs for statistical detection of typos
  • Detection of incorrect checksums in ISBN and IBAN numbers
  • Detection of more than 75 other additional errors
  • API access


A good fit for companies, agencies, publishing houses

Add-on for Microsoft Word

We offer an add-on (beta version) for Microsoft Word 2013-2016 and Outlook 2013-2016 on Windows, exclusively for Premium users.

(Download available to premium users at languagetoolplus.com)

  • Step 1

    With the help of the word add-on you can use languagetoolplus.com directly in Word. After installing the add-on, you will have a “Check Page” button in the top right-hand corner of your document. Whenever you would like to check your text, just click that button.

  • Step 2

    After languagetoolplus.com has checked your text, the detected incorrect words and phrases will be shown in a list.

  • Step 3

    If you click on one of these words, a window will pop up giving you an explanation and a suggestion.

  • Step 4

    If you click on a suggested correction, it will substitute the original word...

  • Step 5

    ...and the marker will be gone.

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).

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.

Add-on for Google Docs

Use LanguageTool directly in Google Docs.

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

korrekturen.de
Papyrus Autor
rechtschreibpruefung24.de
IServ
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