Document annotation

A.nnotate is an online web service for sharing notes on documents and web pages using a web browser. No software or plugins need to be installed - it works within the web browser and currently supports Firefox, Internet Explorer 7, Safari and Opera.

Supported document formats include:

  • PDF
  • Microsoft Word
  • Microsoft PowerPoint
  • Microsoft Excel
  • Rich Text Format
  • OpenOffice documents and spreadsheets
  • HTML web pages


Document entry

Documents can be uploaded via the web page, or sent as email attachments to This adds the document to your private space on and sends you a link by return email.

For web pages, you can entering the URL directly or add a browser snapshot button to snapshot the web page you are currently viewing.

Site administrators can add a custom "annotate this page" link that take snapshots on demand and allow readers to attach their notes, feedback and corrections.


Annotation and display options

  • Highlight text to attach a note
  • Highlighted text is used to build up the user's index
  • User defined tags allow sorting and searching within the index
  • Selectable colors for categorizing notes
  • Choice of note display styles: boxes; right-hand margin; footnotes


Group use and collaboration

  • Document sharing tool for issuing email invitations
  • Authorized users can read and reply to each others notes
  • Displayed history of tag changes (eg for workflow or decision making)


Indexing and search

  • Per-document list of annotations organized by date, tags, or title
  • Thumbnails of all document pages for easy recognition
  • Global document list and searchable index


Payment and licensing operates a pay-as-you go credit system. You can purchase credits in advance with most major credit cards. Credits are used up when a new document is uploaded and made annotatable. Charges start at $0.10 per page with discounts for bulk purchase. Payments in other currencies are charged at the current exchange rate. Once you have an account, you can buy credits from your account page: see price list for details.

The system is also available for licensing for unlimited use either in-house or on a dedicated server. Please get in touch for details.


System requirements

Supported browsers include:

  • Firefox on Windows, Linux or Mac OSX
  • Internet Explorer 7
  • Safari
  • Opera