HTML5 collaborative whiteboard for tablets

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Collabdraw is an open-source online whiteboard application built to work on desktops and tablets alike. The user interface is HTML5 (using enyojs), and the backend runs on python tornado and redis.


  1. Works on most tablets out of the box, interface designed for touch interfaces
  2. Multiple rooms, pages for collaboration
  3. Take quick snapshots of the board
  4. Upload pdf and annotate on whiteboard
  5. Support for SSL, and authentication
  6. Fast, handles lots of users simultaneously
  7. Runs on heroku out of the box!


  1. Python 3.2+
  2. Redis server
  3. All python packages specified in requirements.txt (which might involve installing other non-python dependencies like cairo, redis)
  4. libpoppler (for pdfseparate), imagemagick (for mogrify) for upload functionality
  5. ffmpeg to enable video functionality


  1. Install all system requirements. If on Ubuntu/Debian do:

    apt-get install python3 redis-server poppler-utils imagemagick ffmpeg python3-pip git pkg-config libcairo2-dev
  2. Clone the git repository

    git clone git://
  3. Initialize submodules to get enyojs libraries.

    cd collabdraw
    git submodule init
    git submodule update
  4. Install python library requirements

    pip-3.2 install virtualenv
    virtualenv venv
    source venv/bin/activate
    pip install -r requirements.txt
  5. Set the hostnames, ports and other options in Most of the options are explained in the config file. You need the url that points to your redis server, and the url that points to your websocket endpoint

  6. Test if your setup works

    collabdraw> ./


  1. Start the redis server (On Ubuntu/Debian, on most setups, this is started automatically on installation)
  2. Run python