How to save an HTML5 Canvas as an image on a server?

Question

I\'m working on a generative art project where I would like to allow users to save the resulting images from an algorithm. The general idea is:

• Create an image

Answer 1

In addition to Salvador Dali's answer:

on the server side don't forget that the data comes in base64 string format. It's important because in some programming languages you need to explisitely say that this string should be regarded as bytes not simple Unicode string.

Otherwise decoding won't work: the image will be saved but it will be an unreadable file.