CSE HTML Validator (also referred to as HTML Validator) is a very important part of an HTML development environment. Before publishing web pages, especially pages created manually or with a "dumb" HTML editor, you should check them for syntax errors, misspelled words, and broken links. CSE HTML Validator functions as that checker, helping to make sure that your web pages are written in correct syntax so that they are viewed as intended in a variety of web browsers. If you don't check your web pages, then there's a much greater chance that your visitors will run into problems, especially if they use a web browser that is different from the one you used to create your web pages.