The height attribute on an <iframe> tag sets the height of the iframe element.
The height is specified in pixels - without the ‘px‘ unit.
An <iframe> element with a height attribute.
<iframe src="https://www.wikipedia.org/wiki/Vincent_van_Gogh"
height="450" style="width:100%;"></iframe>
The height attribute specifies the height of the iframe element.
The height is specified in pixels -- without the 'px' unit.
Percentages (%) are not allowed, but most browsers do support it.
The default height of an <iframe> element is 150px.
<iframe height="value" />
| Value | Description |
|---|---|
| value | Height of the iframe in pixels. |
Here is when height support started for each browser:
 Chrome
|
1.0 | Sep 2008 |
 Firefox
|
1.0 | Sep 2002 |
 IE/Edge
|
1.0 | Aug 1995 |
 Opera
|
1.0 | Jan 2006 |
 Safari
|
1.0 | Jan 2003 |
