I recently made and hosted Catifier.com.
It’s working pretty good, except I have a bug with saving I have to work out, and it stretches images when you set them as the background.
Portrait images look horrible.
Would it be possible to detect the width and height of the image a user pastes in the box, then resize the canvas accordingly?
You have to load your picture in a DOM element to know its size.
So basicly when you want to do it, here are the steps :
All can be done in very few javascript lines.