The advantages of online photo editors are that you can use them on any computer (MAC or PC), on any operating system and on most browsers. You don't have to install them, they don't take up space on your hard drive and they don't solicit your memory. Most of them allow you to perform basic editing, some have advanced features while others are specialized in certain areas like animations and special effects. You can interact directly with social networks and photo sharing sites such as MySpace, Facebook, Picasa Albums, Flickr, etc.
Among the drawbacks are the facts that you have to rely on the speed of the server hosting the program, photo uploads take longer, you need a stable Internet connection, you can‘t use the conventional shortcut keys for accessing the menu and sometimes you have a size limit for the photos you can upload.