The most solid feature is lossless responsiveness. Stopping the download gives you a lower-resolution image. When scaled, the image then becomes lossy. Here is

The most solid feature is lossless responsiveness. Stopping the download gives you a lower-resolution image. When scaled, the image then becomes lossy. Here is a thorough analysis of how good that lossy image is: http://flif.info/example.php http://flif.info/example.php It shows how very good lossy BPG is, but also how good FLIF is against anything but BPG (and against lossless BPG).