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HTML <html> xmlns Attribute

Last Updated : 12 Jul, 2025

The HTML <html> xmlns Attribute is used to specify the XML namespace for a document. This attribute is mainly required in XHTML, not valid in HTML 4.01, and optional in HTML 5.

Syntax

<html xmlns="https://www.w3.org/1999/xhtml/">

Attribute Values

Value

Description

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It defines the namespace to use (for XHTML documents).

Example:

Output:

👁 Image

Supported Browsers:

The browser supported by <HTML> xmlns attribute are listed below:

  • Apple Safari 1.0
  • Google Chrome 1.0
  • Firefox 1.0
  • Opera 1.0
  • Internet Explorer 6.0




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