About:

Gradient Finder is an entirely in browser way to convert an image to its CSS gradient. You can also generate CSS gradients and make changes to the files you choose!

It was written by Aaron Marasco and Brian Grinstead

It was (partially) inspired by pngtocss. The main things that are different about GradientFinder is that it accepts more image types than pngs, it accepts arbitrary angles, and it can run in your browser!