h1 - h6 elements

h1 heading

h2 heading

h3 heading

h4 heading

h5 heading

h6 heading

Code

<h1>h1 heading</h1>
<h2>h2 heading</h2>
<h3>h3 heading</h3>
<h4>h4 heading</h4>
<h5>h5 heading</h5>
<h6>h6 heading</h6>

Reference

HTML5 h1, h2, h3, h4, h5 and h6 elements