Convert2XHTML Must be Your Choice Whether You want HTML, XHTML or HTML5 Conversions! First, here is an intro about HTML and XHTML: Hypertext Markup Language (HTML) is the computer language introduced in 1991 as a core format. The object of this language is to write web pages and enable web browsers understand the text, images and other information displayed in a website. Over a period till 2004 several refinements took place and versions released. HTML 4.01 was the last, whereupon web development working groups suggested introducing many features to make HTML easier to use. Accordingly, Extensible Hypertext Markup Language (XHTML) version 1.0 was released.