A simple, compressed, raster image format, which works well for simple graphics such as logos, diagrams, and icons. Filenames end in .gif. Also called simply JPEG, after the Joint Photographic Experts Group, who developed the standard. Very good for photographs and other images with realistic color. Supported by most graphics capable WWW browsers.
Filenames end in .jpg or .jpeg.
Size in Bytes. In addition to creating large file sizes, large images also take up a lot of screen area. If the image is larger than the screen, users will generally not bother trying to see the part theyUre missing. It is also a nuisance if a large graphic pushes succeeding text too far down. Remember to allow for users of PC's and Macs with low-resolution screens.