<body style="margin:0px;padding:0px;overflow:hidden"> <iframe src="http://www.youraddress.com" frameborder="0" style="overflow:hidden;overflow-x:hidden;overflow-y:hidden;height:100%;width:100%;position:absolute;top:0px;left:0px;right:0px;bottom:0px" height="100%" width="100%"></iframe> </body>

full width and height iframe

#IFRAME_ID { width: 100%!important; height: 100%!important; } <iframe src="http://www.youraddress.com" id="IFRAME_ID"></iframe>

set iframe height and width

<body style="margin:0px;padding:0px;overflow:hidden"> <iframe src="http://www.youraddress.com" frameborder="0" style="overflow:hidden;height:100%;width:100%" height="100%" width="100%"></iframe> </body>

full width and height iframe