HTML Checking for Large Sites
Rocket Validator automatically checks your pages on the W3C Validator.
HTML issues tagged as heading.
The <h1> through <h6> elements are headings for the sections with which they are associated. They should not be empty, for example <h1></h1> is invalid.
25,000 HTML checks per month. Is that enough for your site?
Save time using our automated web checker. Let our crawler check your web pages on the W3C Validator.