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 ...

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 ...

In December, Google told us they would move its structured data testing tool from Google's site to the Schema.org domain. This was after it first said it will deprecate the tool, since Google only ...

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 ...

A recent tweet from Google’s Gary Illyes called attention to problem of invalid HTML. Google is fine with invalid HTML. Less well known is that there are negative outcomes associated with invalid HTML ...