What is a MHTML page?
A MHTML (short for MIME HTML) is a file extension for a Web page archive file format as saved by Internet Explorer. The archived Web page is an MHTML document. It saves the Web page content and incorporates external resources, such as images, applets, Flash animations and so on, into HTML documents.
In Internet Explorer, when you save a Web page as a Web archive, the page is saved as an MHTML file. Any relative links in the HTML (those that don’t include all information about the location of the content but assume all content is in a directory on the host server) will be remapped so the content can be located.