HTML Checking for Large Sites

Rocket Validator automatically checks your pages on the W3C Validator.

Start tag “a” seen but an element of the same type was already open.

An <a> tag can’t include other <a> tags inside. Most probable cause is an unclosed <a> tag, like in this example:

<a href="one.html">Page 1
<a href="two.html">Page 2</a>

Related W3C validator issues

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.