When writing software to crank out HTML automatically, it's worth the extra time to feed the output through the Validator to make sure it's right from the ground up, instead of having to troubleshoot ...

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 ...

What does HTML validator actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

However there are valid reasons why you should consider valid HTML. Related: W3C Validator: What It Is & Why It Matters For SEO 6 Reasons Google Advises to Validate HTML 1. Could affect crawl rate 2.