Pixelator.js

var instance = new Pixelator({
  target: document.querySelector('img'),
  width: 600,
  height: 338,
  size: 30 // You can also change this using the `setSize()` method
});

// You can call pixelate as often as you like, for each frame in a video 
// or perhaps while changing the pixel size for some sweet effects.
instance.pixelate();

// The canvas with all that awesome pixelation is stored in instance.el.
$(document.body).append(instance.el);