HTML (Hyper Text Markup Language) is the standard content markup language of the web. It is an open standard developed and maintained by W3C (World Wide Web Consortium).
HTML is a markup language similar to XML that is predominantly used to create web pages.
HTML standards, as well as those for many other web technologies, are maintained by the World Wide Web Consortium (W3C). The current iteration of the language, HTML 4, was introduced in 1997, and the next iteration, HTML5, is currently under active development jointly by the W3C and the Web Hypertext Application Technology Working Group (WHATWG).
Useful tools and references