RWD bookmarklet, Web designer must have, a great responsive site test tool

To test a responsive site is sometimes a trouble job. Now your explorer can with this feature by just one click.

Site: http://responsive.victorcoulon.fr/

How to use the bookmarklet?
In the center of screen the RWD Bookmarklet is a tool, simply drug and drop it onto your bookmark bar. Here is an example by using Chrome:

Get the bookmarklet works for you

And now your explorer then adds an test tool, whatever site you are exploring, click it and go into test mode, cheers!

How to test a site?
Click on any of the mobile device icon, and you see the preview result.