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A GameBoy Color emulator written in JavaScript.
JavaScript CSS
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JavaScript GameBoy Color Emulator

Copyright (C) 2010 - 2012 Grant Galitz

A GameBoy Color emulator that utilizes HTML5 canvas and JavaScript audio APIs to provide a full emulation of the console.


This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. The full license is available at This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Known browsers to work well in:

  • Firefox 4-27 (Windows 7, Windows Vista, Mac OS X)
  • Google Chrome 18+
  • Safari 5.1.5+

Browsers that suck at performance or fail to run the code correctly:

  • Firefox 4+ (*nix versions of Firefox have audio lockup bugs) - Retest this
  • Firefox 28+ (Web Audio API creates 500 ms or greater latency, forced by Firefox)
  • Opera (Crashes + Slow + Graphics Glitches) - Retest this
  • Safari 5.1.X (Below 5.1.5) (Slow or crashes)
  • IE 1-8 (Cannot run)
  • IE 9-10 (Slow, No native audio support (Requires flash bridge in the audio lib))
  • IE 11 (No native audio support (Requires flash bridge in the audio lib))
  • Firefox 1-3.6 (Slow)
  • ALL VERSIONS OF MOBILE SAFARI AND OPERA (Stop pestering me, iOS just CAN'T run this well.)

CPU instruction set accuracy test results (Blargg's test ROM):

  • GameBoy Online:

    GameBoy Online (This emulator)

  • Visual Boy Advance 1.7.2:

    Visual Boy Advance 1.7.2

  • KiGB:


  • Gambatte:


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