The <h1> to <h6> elements are used to define six levels of HTML Headings, with <h1> being the highest (or most important) level and <h6> the least important one.
Each web page must have only one <h1> heading. As search engines use it to index the structure and content of web documentst, be sure to include keywords in it.
Syntax
The <h1>-<h6> tags come in pairs, so the closing tag is required.
As the <h1> to <h6> tags are block-level elements, they always start on a new line and take up the full width available.
Example
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
</head>
<body>
<h1>First-level heading</h1>
<h2>Second-level heading</h2>
<h3>Third-level heading</h3>
<h4>Fourth-level heading</h4>
<h5>Fifth-level heading</h5>
<h6>Sixth-level heading</h6>
</body>
</html>Result
The <h1>-<h6> elements must not be used to markup subheadings, subtitles, alternative titles and taglines unless intended to be the heading for a new section or subsection.
As the align attribute is not supported in HTML5, use the CSS font-size and font-weight properties instead.
Attributes
| Attribute | Value | Description |
|---|---|---|
| align | left right center justify |
Defines the vertical alignment of the tag content.
Not supported in HTML 5. |
The <h1> to <h6> tags support the Global Attributes and the Event Attributes.
Browser support
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