GIF (Graphic Interchange Format)

The most common format for image files, especially suitable for images containing large areas of the same colour. GIF format files of simple images are often smaller than the same file would be if stored in JPEG format, but GIF format does not store photographic images as well as JPEG.

JPEG (Joint Photographic Experts Group)

JPEG is most commonly mentioned as a format for image files. JPEG format is preferred to the GIF format for photographic images as opposed to simple artwork.

PING

A new file type which is not widely used. Many people believe that this may replace the GIF as the most popular graphic file type.

BITMAP (BMP)

A very large file type. The colour density is rather low, the maximum being 256 colours. It is not advisable to use bitmaps on web sites as they increase the time taken for a server to receive the information.