The 2 widely supported formats displayed on the web are GIF and JPG.

.gif - Graphics Interchange Format

• GIF's compression is called "lossless" - meaning "doesn't lose quality" when compressed.
• Does not lose quality when compressed and decompressed.
• Limited to 256 colors.
• Used for cartoons, line-art, and flat illustrations rather that photos.
• The only file format that allows for transparent images.

.jpeg - Joint Photographic Experts Group

• One of the most efficient compression file formats.
• JPG compression is called "lossy" compression - means the image "loses" quality during the compression process.
• The file size of a graphic is smaller in the JPG version than in the GIF version.
• 16 million colors
• Ideal for Photos
• Does not work well on simple graphics; image loses clarity and sharpness.
• Does not allow for transparent images.

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