Raster image

A raster image is an image file defined as a grid of pixels. They’re also referred to as bitmaps. Common raster image formats on the Web are {{Glossary("JPEG")}} , {{Glossary("PNG")}} , {{Glossary("GIF")}} , and ICO.

Raster image files usually contain one set of dimensions, but the ICO and CUR formats, used for favicons and CSS cursor images, can contain multiple sizes.