<h1>–<h6>: The HTML Section Heading elements

The HTML <h1><h6> elements represent six levels of section headings. <h1> is the highest section level and <h6> is the lowest.

Content categories Flow content, heading content, palpable content.
Permitted content Phrasing content.
Tag omission None, both the starting and ending tag are mandatory.
Permitted parents Any element that accepts flow content; don't use a heading element as a child of the <hgroup> element — it is now deprecated.
Implicit ARIA role heading
Permitted ARIA roles tab, presentation or none
DOM interface HTMLHeadingElement

Attributes

These elements only include the global attributes.

The align attribute is obsolete; don't use it.

Usage notes

  • Heading information can be used by user agents to construct a table of contents for a document automatically.
  • Avoid using heading tags to resize text. Instead, use the CSS font-size property.
  • Avoid skipping heading levels: always start from <h1>, followed by <h2> and so on.
  • Use only one <h1> per page or view. It should concisely describe the overall purpose of the content. 
  • Using more than one <h1> will not result in an error, but is not considered a best practice. It is beneficial for screenreader users, and SEO.
  • While HTML5 allows a <h1> per sectioning element, it is not considered best practice, and may subvert the expectations of how screen reader users navigate.

Examples

All headings

The following code shows all the heading levels, in use.

<h1>Heading level 1</h1>
<h2>Heading level 2</h2>
<h3>Heading level 3</h3>
<h4>Heading level 4</h4>
<h5>Heading level 5</h5>
<h6>Heading level 6</h6>

Here is the result of this code:

Example page

The following code shows a few headings with some content under them.

<h1>Heading elements</h1>
<h2>Summary</h2>
<p>Some text here...</p>

<h2>Examples</h2>
<h3>Example 1</h3>
<p>Some text here...</p>

<h3>Example 2</h3>
<p>Some text here...</p>

<h2>See also</h2>
<p>Some text here...</p>

Here is the result of this code:

Accessibility concerns

A common navigation technique for users of screen reading software is jumping from heading to heading to quickly determine the content of the page. Because of this, it is important to not skip one or more heading levels. Doing so may create confusion, as the person navigating this way may be left wondering where the missing heading is.

Don't

<h1>Heading level 1</h1>
<h3>Heading level 3</h3>
<h4>Heading level 4</h4>

Do

<h1>Heading level 1</h1>
<h2>Heading level 2</h2>
<h3>Heading level 3</h3>

Nesting

Headings may be nested as subsections to reflect the organization of the content of the page. Most screen readers can also generate an ordered list of all the headings on a page, which can help a person quickly determine the hierarchy of the content:

  1. h1 Beetles
    1. h2 Etymology
    2. h2 Distribution and Diversity
    3. h2 Evolution
      1. h3 Late Paleozoic
      2. h3 Jurassic
      3. h3 Cretaceous
      4. h3 Cenozoic
    4. h2 External Morphology
      1. h3 Head
        1. h4 Mouthparts
      2. h3 Thorax
        1. h4 Prothorax
        2. h4 Pterothorax
      3. h3 Legs
      4. h3 Wings
      5. h3 Abdomen

When headings are nested, heading levels may be "skipped" when closing a subsection.

Labeling section content

Another common navigation technique for users of screen reading software is to generate a list of sectioning content and use it to determine the page's layout.

Sectioning content can be labeled using a combination of the aria-labelledby and id attributes, with the label concisely describing the purpose of the section. This technique is useful for situations where there is more than one sectioning element on the same page.

Example

<header>
  <nav aria-labelledby="primary-navigation">
    <h2 id="primary-navigation">Primary navigation</h2>
    <!-- navigation items -->
  </nav>
</header>

<!-- page content -->

<footer>
  <nav aria-labelledby="footer-navigation">
    <h2 id="footer-navigation">Footer navigation</h2>
    <!-- navigation items -->
  </nav>
</footer>

In this example, screen reading technology would announce that there are two <nav> sections, one called "Primary navigation" and one called "Footer navigation". If labels were not provided, the person using screen reading software may have to investigate each nav element's contents to determine their purpose.

Specifications

Specification Status Comment
HTML Living Standard
The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification.
Living Standard
HTML5
The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification.
Recommendation
HTML 4.01 Specification
The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification.
Recommendation

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
h1Chrome Full support YesEdge Full support 12Firefox Full support 1IE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support 4Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

Full support  
Full support

See also