HTML5 is the subsequent main revision of the HTML standard intervening HTML 4.01, XHTML 1.0, and XHTML 1.1. HTML5 is a standard for configuring and presenting content on the World Wide Web. HTML5 is a collaboration between the Web Hypertext Application Technology Working Group (WHATWG) and the World Wide Web Consortium (W3C). The new standard integrates features like drag-and-drop and video playback that have been earlier reliant on on third-party browser plug-ins such as Google Gears, Microsoft Silverlight, and Adobe Flash.
The newest versions of Opera, Mozilla Firefox, Google Chrome and Apple Safari all support several HTML5 features. Also, Internet Explorer 9.0 will have support for few HTML5 functionality. Pre-installed mobile web browsers on Android phones, iPads and iPhones all have very good support for HTML5.