The rate of using mobiles rapidly increases in the whole world. Websites are the heart and soul of the internet. The contents of these websites are accessed by the computers and mobiles. Now desktop computer/ laptops replaced by the latest mobile phones because they have all the necessary features of a computer carried by a small pocket device. With this transformation there are some issues for web developers that the compatibility of contents of a web site. Websites which used to be viewed on desktops are now being viewed on smartphones. So websites are created by the developers should be compatible for mobile platform also. The aim of this paper is to discuss some migration facts, new technologies, maintaining a single codebase for all devices used for making the websites responsive.