Data URI scheme

The data URI scheme is a uniform resource identifier (URI) scheme that provides a way to include data in-line in Web pages as if they were external resources. It is a form of file literal or here document. This technique allows normally separate elements such as images and style sheets to be fetched in a single Hypertext Transfer Protocol (HTTP) request, which may be more efficient than multiple HTTP requests,[1] and used by several browser extensions to package images as well as other multimedia content in a single HTML file for page saving.[2][3] As of 2022^[update], data URIs are fully supported by most major browsers, and partially supported in Internet Explorer.[4]