An iframe is used to display a web page within a web page.

Iframe Syntax

An HTML iframe is defined with the <iframe> tag:

<iframe src="URL"></iframe>

The src attribute specifies the URL (web address) of the inline frame page.

Iframe – Set Height and Width

Use the height and width attributes to specify the size of the iframe.

The attribute values are specified in pixels by default, but they can also be in percent (like “80%”).

Example

<iframe src="demo_iframe.htm" height="200" width="300"></iframe>

Or you can use CSS to set the height and width of the iframe:

Example

<iframe src="demo_iframe.htm" style="height:200px;width:300px;"></iframe>