[quarterto]

Not to detract from what is a pretty cool project, and I hope OP had fun making it, but: http://codepen.io is this and quite a bit more. It supports HTML+JS+CSS as well as e.g. Jade, SASS and CoffeeScript- if that's what floats your boat- and some nice social features, like featured pens and saving to Gists.

Other commenters have pointed out a myriad of similar such services. I'm surprised Codepen hasn't come up already.

@brycecolquitt, you are obviously very talented, and I look forward to whatever you come up with in the future. I just hope it's not in a space as hotly contested as this.

[brycecolquitt]

Thanks, but this was actually made by my friend Nathan Bashaw (nbashaw). I just submitted it because I think it's awesome :) I think the tool is great for a certain group of people: beginners and front-end folks who want to quickly see what something looks like or do some debugging.

I'm not sure if codepen supports the realtime google-docs-style collaboration, either, which Scratchpad is good for. It's simple product with no superfluous features.

[ianstormtaylor]

Yeah but it's nowhere near as nice to edit with. The textarea's are short, the content frame is short... I think this is a case where simplicity wins out.

SASS would be a cool feature though.. (as long as it came with Compass)