Greyboard is an HTML5 multiplayer whiteboard.
JavaScript CSS


Greyboard is an HTML5 multiplayer writeboard.


There is no license yet, so please assume the code may only be used for learning purposes and/or hosting a private Greyboard server.


  1. Install the latest version of Node.js.
  2. Install the prerequisites for node-canvas:

    $ sudo apt-get install libcairo2-dev libjpeg8-dev libpango1.0-dev libgif-dev build-essential g++

  3. Install modules in the Greyboard directory:

    $ cd greyboard $ npm install

  4. Configure config.json and rooms/*/config.json with your editor of choice.

  5. Start Greyboard:

    $ node app.js

Libraries used

  • JSON2
  • Tinycolor
  • Underscore.js

On the server side only:

  • Express web framework
  • Node-canvas

On the client side only:

  • JQuery
  • JQuery-ui [being phased out, used only for slider]
  • Twitter Bootstrap
  • LAB.js [async loading]
  • URI.js