Testing Page <style> div.center iframe{ display: block; margin-left: auto; margin-right: auto; } </style> <iframe src="https://docs.google.com/forms/d/e/1FAIpQLScfReUK7rJBviPvQE5OEeiniWwJzJg_rW78yahZYBs4J39pAg/viewform?embedded=true" width="800" height="1400" frameborder="0" marginheight="0" marginwidth="0">Loading...</iframe>