10 Useful Responsive Design Testing Tools

To make the crucial duty of testing your site’s responsiveness easier, here are a few excellent free online tools to check out.
ResponsiveTestThis open-source tool (repo is on GitHub in case you want to set it up locally) lets you see how a web page will render in various screen sizes. There are lots of devices supported by ResponsiveTest, such as iPhone, Blackberry, Samsung mobile phones, Dell laptops, and much more.
ResponsinatorResponsinator takes in a URL and then outputs a sequence of