title: How can I run an HTML5 validator against an entire website?
body: <p>I've been using HTML5 in websites for about a year now, but the W3C doesn't offer an option to check if an entire domain is valid.  There are tools out there to do this with HTML4, but they aren't helpful in HTML5.</p>
  
  <p>Is there an online service or browser extension that can solve this problem?  I've looked but couldn't find any.</p>