HTML Checking for Large Sites
Rocket Validator automatically checks your pages on the W3C Validator.
HTML issues tagged as complementary.
Using the <aside> element will automatically communicate a section has a role of complementary, so specifying the role="complementary" is redundant.
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.