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A high-quality image preserves more information and results in a larger file size.

A low-quality image discards more information, but produces a smaller file size.

Logos, illustrations, and line drawings are well-suited to this format.

Because JPEGs were designed to handle photographic images, they can significantly reduce the size of images containing gradients and soft edges, without producing noticeable degradation. Unlike the JPEG format, GIFs do not use lossy compression.

However, even though the image is visually smaller, the file size remains the same.

A visitor to your website still must download the 30k file which translates to slower loading time for the image (and possibly the page) and a potentially poor user experience, especially if they have low bandwidth.

However, reproducing sharp edges and solid areas of color often requires a higher quality setting. Instead, GIFs rely on a maximum of 256 colors to reduce the size of images.

This means that images with a limited number of colors can be reproduced without degradation.

For more Adobe Dreamweaver training options, visit AGI’s Dreamweaver Classes. Just as lists make content friendlier and more accessible, images help to give your visitors the rich, visual experience that they’ve come to expect on the Web.

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