Responsive HTML will help you preview how your web application will respond as a responsive design in various screen sizes and in real-time. You can change your viewport based on custom dimensions (below 1024x768), animate screen resizes using the dimension sliders, or choose device presets such as: iPhone, iPad, Kindle Fire or PlayStation Vita.
Please note that the rating of 17+ is assigned to this application solely based on the ability to access the internet without filtering.