Plugin to Show Responsive Sites

Hello, good morning. Does anyone know any plugin that allows me to show the sites of my portfolio are responsive? I idealized something like that iframe that usually appears when we get a theme that displays the icons of the devices and when we click adjusts the content to display … So: http://www.uploady.com/#!/download/nZP1GKfsNG7/vBDT7mpEHpYbbcki. I thank you for your attention!