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

::: section-content The <h1> to <h6> HTML elements represent six levels of section headings. <h1> is the highest section level and <h6> is the lowest. By default, all heading elements create a block-level box in the layout, starting on a new line and taking up the full width available in their containing block. :::

Try it #

::: section-content ::: iframe ::: {.output-header .border-rounded-top}

HTML Demo: <h1-h6> #

Reset :::

::: {#warning-no-script .warning-container} ::: warning The interactive example cannot be shown because JavaScript is disabled. ::: :::

::: {#warning-mathml-not-supported .warning-container .hidden} ::: warning The interactive example cannot be shown because MathML is not supported by your browser. ::: :::

::: {#editor-container .editor-container .tabbed-standard .hidden .border-rounded-bottom editor-type=“tabbed”} ::: {#tab-container .section .tabs} ::: {#tablist .tab-list role=“tablist”} HTML

CSS

JavaScript :::

::: {#html-panel .section .hidden tabindex=“0” role=“tabpanel” aria-labelledby=“html” aria-hidden=“true”} ::: {#html-editor}

Beetles

External morphology

Head

Mouthparts

Thorax

Prothorax

Pterothorax

::: {#css-panel .section .hidden tabindex=“0” role=“tabpanel” aria-labelledby=“css” aria-hidden=“true”} ::: {#css-editor} h1, h2, h3, h4 { margin: 0.1rem 0; }

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
  padding-left: 20px;
}

h3 {
  font-size: 1.2rem;
  padding-left: 40px;
}

h4 {
  font-size: 1rem;
  font-style: italic;
  padding-left: 60px;
}

::: :::

::: {#js-panel .section .hidden tabindex=“0” role=“tabpanel” aria-labelledby=“js” aria-hidden=“true”} ::: {#js-editor} ::: ::: :::

::: {#output .output-container}

Output #

::: :::

::: {.section .console-container .hidden aria-hidden=“true”}

Console Output #

![] clear console

::: {#console .console} ::: :::

::: {#html-output .output .editor-tabbed} %html-content% ::: :::

Attributes #

::: section-content These elements only include the global attributes. :::

Usage notes #

::: section-content

• Heading information can be used by user agents to construct a table of contents for a document automatically.
• Do not use heading elements to resize text. Instead, use the CSS font-size property.
• Do not skip heading levels: always start from <h1>, followed by <h2> and so on. :::

Avoid using multiple <h1> elements on one page #

::: section-content While using multiple <h1> elements on one page is allowed by the HTML standard (as long as they are not nested), this is not considered a best practice. A page should generally have a single <h1> element that describes the content of the page (similar to the document's <title> element).

::: {#sect1 .notecard .note} Note: Nesting multiple <h1> elements in nested sectioning elements was allowed in older versions of the HTML standard. However, this was never considered a best practice and is now non-conforming. Read more in There Is No Document Outline Algorithm{target="_blank"}. :::

Prefer using only one <h1> per page and nest headings without skipping levels. :::

Examples #

All headings #

::: section-content The following code shows all the heading levels, in use.

::: code-example [html]{.language-name}

<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>

:::

::: {#sect2 .code-example} ::: iframe ::: ::: :::

Example page #

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

::: code-example [html]{.language-name}

<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>

:::

::: {#sect3 .code-example} ::: iframe ::: ::: :::

Accessibility concerns #

Navigation #

::: section-content A common navigation technique for users of screen reading software is to quickly jump from heading to heading in order to 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 do this:

::: code-example [html]{.language-name}

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

:::

Prefer this:

::: code-example [html]{.language-name}

<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.

• Headings • Page Structure • WAI Web Accessibility Tutorials{target="_blank"}
• MDN Understanding WCAG, Guideline 1.3 explanations
• Understanding Success Criterion 1.3.1 | W3C Understanding WCAG 2.0{target="_blank"}
• MDN Understanding WCAG, Guideline 2.4 explanations
• Understanding Success Criterion 2.4.1 | W3C Understanding WCAG 2.0{target="_blank"}
• Understanding Success Criterion 2.4.6 | W3C Understanding WCAG 2.0{target="_blank"}
• Understanding Success Criterion 2.4.10 | W3C Understanding WCAG 2.0{target="_blank"} :::

Labeling section content #

::: 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.

Sectioning content examples #

::: code-example [html]{.language-name}

<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>

:::

::: {#sect4 .code-example} ::: iframe ::: :::

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.

• Using the aria-labelledby attribute
• Labeling Regions • Page Structure • W3C WAI Web Accessibility Tutorials{target="_blank"} :::

Specifications #

::: _table #

Specification #

HTML Standard
[# the-h1,-h2,-h3,-h4,-h5,-and-h6-elements]{.small}

:::

Browser compatibility #

::: _table Desktop Mobile

                   Chrome    Edge   Firefox   Internet Explorer   Opera   Safari   WebView Android   Chrome Android   Firefox for Android   Opera Android   Safari on IOS   Samsung Internet

Heading_Elements 1 12 1 Yes 15 ≤4 4.4 18 4 14 ≤3.2 1.0 :::

See also #

::: section-content

• <p>
• ``
• <section> :::

::: _attribution © 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Heading_Elements{._attribution-link} :::