# Responsive Design Testing This tool is for everyone who needs a quick and easy way to test their website design in multiple screen widths. ## Permalink style testing You can test any website, and provide the link to anyone you like by adding their URL to the end of the testing page address. For example: http://mattkersley.com/responsive?google.com ## Installing on your own server - Copy index.html and responsive.js onto your machine - Update the *defaultURL* at the top of responsive.js to your own website - Upload the files into a subdirectory on your server - Navigate to the new subdirectory via a browser Once you've uploaded, you can navigate your website from within the iframes, and the others will update. This won't work for external sites however due to browser security restrictions.