html iframe full page
<iframe src="mypage.html" style="border: 0; width: 100%; height: 100%">Your browser doesn't support iFrames.</iframe>
Source:stackoverflow.com
iframe – Full Screen – HTML
Source:cp.grupo.host
Full Screen Iframe
<iframe src="mypage.html" style="position:fixed; top:0; left:0; bottom:0; right:0; width:100%; height:100%; border:none; margin:0; padding:0; overflow:hidden; z-index:999999;">
Your browser doesn't support iframes
</iframe>
Source: stackoverflow.com