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Image Optimization > GIF–Graphical Interchange Format

GIF–Graphical Interchange Format

GIF is the most flexible of all the image formats for the Web. It can display photos with a decent level of quality, does an excellent job of compressing graphics, and even offers animation. So it should come as no surprise that our coverage of GIF is so extensive.

How Does GIF Compress?

GIF applies two compression techniques to images. One is called CLUT, which stands for Color Look-Up Table. The other is the LZW compression algorithm. Let’s take a closer look at each of them to understand why GIF yields much better results with certain images than with others.


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