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See it live

Register and start using it
Register and start using it

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Take the tour

co-ment : Web-based text annotation


co-ment® makes it possible for you to write or upload your own texts, submit them for comments and process the comments. Learn more »
See it in action on a public text.

The source code for the full functionality of the co-ment service is distributed as free software under the GNU Affero GPL version 3. Learn more »


  • upload any document (MSWord, RTF, OpenOffice Document) or write it directly with your browser
  • work privately on your text with a few chosen collaborators or open the commenting process to the public
  • use comments to improve your document and create new versions of your text
  • export your text (and all comments) in any format (MS Word, OpenOffice Document, etc.)
  • and more »

co-ment blog

Embedding co-ment™ hosted texts in your web pages
Read Web reviews of co-ment
Launch of co-ment online commercial service




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