Software that checks the validity of tags in an HTML document. Browsers treat errors differently, such as a start tag without an end tag, a lack of quotes or extra quotes. Unless an HTML page is ...

CSE HTML Validator Pro ($69 direct) is an impressive Windows tool for HTML validation, link checking, and more. Validator Pro combines a text editor and integrated Web browser with sophisticated and ...

Various online services are available to validate the codes. For example, the HTML Validator add-on in Firefox, W3C Validator, and others can validate your code automatically. However, over a period ...

Google has said many times that poor or invalid HTML validation doesn't impact rankings. Of course, web sites that don't work, a search engine cannot crawl. But if your site works but doesn't validate ...