Learn Images

An in-depth course on images for the web.

A history of images on the web, starting with the image element in 1993

Learn ways to ensure that your image requests are as small and performant as possible.

Learn about SVG, the vector image format used on the web.

Discover raster images, such as JPEG, GIF, PNG, and WebP.

Understand the GIF image format, along with an explanation of how image encoding works.

Find out when PNG is the best image format to choose.

Learn about the most common image format on the web.