HTMLstands for Hyper Text Markup Language . This is a markup language designed for the creation of web pages with hypertext and other information to be displayed in a web browser. It provides a means to describe the structure of text-based information in a document, by denoting certain text as links, headings, paragraphs, lists, and so on and to supplement that text with interactive forms, embedded images, scripts and other objects. HTML source code is written in the form of tags, surrounded by angle brackets.
Normally this source viewer tool is used to see how the web pages are marked up, how and what tags are used to mark up. This is free tool so yo may see the Ads. Although this is useful for web learners and web begainers, to take some ideas by viewing verious types of websites source code. This tool may helpful for you, please don't forget to leave your valuable comments.