After rainbowifying your avatar scroll down for the avatar you can save to your computer or device.
Click to pre-fill Twitter avatar: https://twitter.com/INSERT_YOUR_USERNAME_HERE/profile_image?size=original
Click to pre-fill app.net avatar: https://api.app.net/stream/0/users/@INSERT_YOUR_USERNAME_HERE/avatar?w=200&h=200
After saving it you can upload your new rainbowified avatar to your favorite social network profile.
This Rainbowify Avatar App works with Safari, Firefox, Chrome & Internet Explorer 9+. Support for HTML5 and advanced canvas features is required.