Web Tools Handy on-line HTML, CSS & JavaScript tool

Hello Peeps,

Was having a wee browse and found this on-line tool that lets you write-up HTML, CSS & JavaScript code. The results are shown on the same page (Just press "Run") seems handy for testing!?

JS Fiddle

Not sure if anyone has used this yet but thought I'd give you a heads up anyway. Its a handy tool for myself as I can now pretend to the girlfriend that I'm surfing the web and not playing around with websites

Being a Noob! (yes, Noob, although my girlfriend likes to re-place a letter and re-arrange when I'm in the bad books ) I'm forever looking at various websites for ideas and tips on creating designs and this tool is ideal for me to play about with code from other sites that helps me understand how the code works etc