Try it Editor: html5

Edit This Code :



<!DOCTYPE html>
<html>
<body>

<article>
  <header>
    <h1>Most important heading here</h1>
    <h3>Less important heading here</h3>
    <p>Some additional information here.</p>
  </header>
  <p>Lorem Ipsum dolor set amet....</p>
</article>

</body>
</html>

Result :

html5_header