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Chapter 27. Web > Optimization

Optimization

Optimization is the process by which file format, storage size, and color parameters are chosen for an output image to preserve as much of its quality as possible while still enabling it to download quickly on the Web. Illustrator provides a variety of choices and options for optimization. In this section you will learn the basic steps. Your overall goal is to reduce the file size until the quality of the optimized image reaches its reduction limit (starts to degrade). Keep this goal in mind as you choose various palette options.

GIF and JPEG are the two most commonly used file formats for displaying graphics on the Web. GIF is recommended for optimized images that contain elements with sharp edges, such as solid-color areas, line art, or text. The PNG-8 format, which is similar to GIF, uses the same Optimize palette options, with practically the same results. An optimized GIF or PNG-8 file can contain up to 256 colors. You can view the color table for GIF and PNG-8 files and manipulate individual colors in the optimized image. Use the SVG format to output Illustrator objects as vectors (without rasterization) for viewing in a Web page.


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