Report: State of Images

Images are the most popular resource type on the web. In this report we analyze how images are being used across the web.

Image Bytes

The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image.

See also: Page Weight

Image Requests

The number of external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image.

See also: Page Weight

Offscreen Image Savings

The number of kilobytes that could be saved per page by lazy-loading offscreen and hidden images. This metric comes from Lighthouse and is only available in mobile tests.

Optimized Image Savings

The number of kilobytes that could be saved per page by setting JPEG compression levels to 85 or lower. This metric comes from Lighthouse and is only available in mobile tests.