LanguageTool Plus proofreading software

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:
  • English example: Create two strips with an event amount of wax on each strip. → even
  • German example: Da Auto fährt schnell. → Das
  • French example: plus c'est meilleur → meilleur c'est
    With Premium, French also includes errors found by Grammalecte
input: text, output: JSON with the detected errors and style issues

Pricing

Free

2500 characters per check (instead of 1500)

  • More than 1700 patterns for finding errors (English)
  • More than 2400 patterns for finding errors (German)
  • Add-in 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 1000 other additional errors (English, German, French)
  • API access

0€

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Premium



40,000 characters per check

  • More than 1700 patterns for finding errors (English)
  • More than 2400 patterns for finding errors (German)
  • Add-in 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 1000 other additional errors (English, German, French) 
  • API access
/month
/year
all prices incl. VAT
For students, authors, freelancers, agencies, companies, nonprofit organizations

Developer API

40,000+ characters per check

  • More than 1700 patterns for finding errors (English)
  • More than 2400 patterns for finding errors (German)
  • Add-in 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 1000 other additional errors (English, German, French)
  • API access 

per month · API details
A good fit for software companies and publishing houses

Add-on for Firefox and Chrome

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

To use the premium features (more error detection rules, support for longer texts) with the add-on, configure it as shown in the videos below:

Chrome settings · Firefox settings

Add-on for Google Docs

LanguageTool Plus integrates with Google Docs. Configure your Premium access using Add-ons → LanguageTool → Options after having opened a document.

Add-in for Microsoft Word

We offer an add-in for Microsoft Word 2016 or later for Premium users. Works on Windows, Mac, and Word Online. No character limit here - use with documents of any length! Use the same email/password as on this site when configuring the add-on.

  • 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.

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