The <html> tag in HTML is used to define the root of HTML and XHTML documents. The <html> tag tells the browser that it is an HTML document. It is the second outer container for everything that appears in an HTML document followed by the <!DOCTYPE> tag. The <html> tag requires a starting and end tag.
Syntax:
<html> HTML Contents... </html>
Attribute Value: The <html> tag contains single attribute xmlns whose attribute value is http://www.w3.org/1999/xhtml. It is used to define namespace attributes.
Example 1:
HTML
<!DOCTYPE html>
< html >
< head >
< title >
How to define the root
of an HTML document?
</ title >
</ head >
< body style = "text-align: center;" >
< h1 style = "color: green;" >
GeeksforGeeks
</ h1 >
< p >
A computer science portal
</ p >
</ body >
</ html >
|
Output:

Example 2:
HTML
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
< head >
< title >
How to define the root
of an HTML document?
</ title >
</ head >
< body style = "text-align: center;" >
< h1 style = "color: green;" >
GeeksforGeeks
</ h1 >
< p >
A computer science portal
</ p >
</ body >
</ html >
|
Output:

Supported Browsers:
- Google Chrome
- Internet Explorer
- Firefox
- Opera
- Safari