By signing on to Picnik, users can upload photos from their desktop and alter their colour, brightness and other characteristics. When done, they can post them on popular photo-sharing or social-networking sites. The tool is entirely accessible from a user's browser - so there’s no need to download or install software.
The free version of Picnik is ad-supported. But dedicated users can spend around US 25 for a one-year subscription for access to a more feature-rich, ad-free version.