The ultimate aim of a front-end developer should be to develop HTML that would meet W3C standards since W3C (World Wide Web Consortium) validator is the world finest quality checker of HTML code. I found many programmers whether working as a freelancer or under an agency, neglect the HTML coding guidelines and in the result, they fail to meet the W3C standards. It’s not that simple though to meet the W3C HTML validator standards, especially when someone is not following the proper HTML coding guidelines. Now the question arises; what are the guidelines for HTML coding? Here, we are going to share the most important HTML standards with the hope our readers will learn from this topic share views if they face any issues adopting it.