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Annotator is a JavaScript library for building annotation applications in browsers. It provides a set of interoperable tools for annotating content in webpages. For a simple demonstration, visit the Annotator home page or download a tagged release of Annotator from the releases page and open demo.html.

Components within Annotator provide:

  • user interface: components to create, edit, and display annotations in a browser.
  • persistence: storage components help you save your annotations to a remote server.
  • authorization and identity: integrate Annotator with your application's login and permissions systems.


See Installing and Configuring and using Annotator from the documentation.

Writing a module

See Module development.


See HACKING.rst.

Reporting a bug

Please report bugs using the GitHub issue tracker. Please be sure to use the search facility to see if anyone else has reported the same bug -- don't submit duplicates.

Please endeavour to follow good practice for reporting bugs when you submit an issue.

Lastly, if you need support or have a question about Annotator, please do not use the issue tracker. Instead, you are encouraged to email the mailing list.


The Annotator project has a mailing list, annotator-dev, which you're encouraged to use for any questions and discussions. It is archived for easy browsing and search at gmane.comp.web.annotator. We can also be found in the #annotator channel on Freenode.