Codepen.io – An HTML, CSS, and Javascript web editor

I thought I would share this really cool (and free) online tool that can be used to test out your HTML, CSS, and Javascript. The website is http://codepen.io.

Create out other people’s sample work or test your own by creating a new “pen”. You can instantly check preview your code in action in realtime in a beautiful and elegant online tool. Check out Codepen now!