title: How automatically fix html5 validation warnings?
body: <p>I commonly write a lot html code and when I write I try to follow <a href="http://www.w3.org/community/webed/wiki/HTML/Specifications" rel="nofollow">the specification</a> for a valid and semantic web, normally following the <a href="http://www.w3.org/TR/html5/" rel="nofollow">HTML5 specification</a>. For validate the HTML code I use the <a href="http://validator.w3.org/" rel="nofollow">official W3C Markup validator service</a>.</p>
  
  <p>Also, I have to modify another HTML code from other coworkers, collaborators or even contribute in another external projects.</p>
  
  <p>In my code normally I have a lot errors, but it is more heavy when you have to rewrite the code from others. Also this is a manual operation that cost a lot time only for get "green" status in a validator.</p>
  
  <p>Some changes seems easy like a missing "/" in a <code>&lt;img&gt;</code> tag or a missing title or alt attribute are very frequent. I would know if there are some program or way of automatize certain changes for perform this changes (and don't reinvent the wheel) as a batch and avoid manual time cost with modifications. I mean, not only a check syntax validator (I think that IDEs like Eclipse do exactly that), I am searching more a writing analysis tool that modify the code warnings and fix too, not only warning you about them.</p>