JSNES is a port of vNES to JavaScript, inspired by Matt Wescott'sJSSpeccy. The video is output on a canvas element, and the sound is played with dynamicaudio.js.

On a modern computer, JSNES should run at full speed on Google Chrome, Safari 4, Opera and IE 9. It is unlikely to run at full speed on Firefox unless you have a really fast computer.

The source is available on Github.