HTML Checking for Large Sites
Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as tabindex.
An <a> element cannot contain a descendant element with the attribute tabindex.
A button element cannot contain a descendant element with the attribute tabindex.
Still checking your large sites one page at a time?
Save time using our automated web checker. Let our crawler check your web pages on the W3C Validator.