...Native validation support for file type/size, image width/height/aspect ratio, video/audio duration, and ng-required with pluggable custom sync or async validations. Show thumbnail or preview of selected images/audio/videos. Supports CORS and direct upload of file's binary data using Upload.$http(). Plenty of sample server side code, available on nuget. On demand flash FileAPI shim loading no extra load for html5 browsers. HTML5 FileReader.readAsDataURL shim for IE8-9.