Welcome to the interactive plgrnd.com HTML playground - just write your code and watch it update in real-time!
You can load Gists into Plgrnd by their hash like that:
https://plgrnd.com/#0054409c8e9f0270dab76f8fde977b4c
You can even create a public Gist from right here, just by pressing Ctrl+Enter. Pay attention to the changing URL!
I'm Moritz, a web developer. And I like to quickly try out new things, so I made this. Sure, there are a few similar projects, but they all had some sort of problem - no live preview, everything is unnecessarily stored on a server for online collaboration (which is pretty awesome if you need it), or just plain ugly frameset stuff.
So, here it is: Plgrnd. It's simple, and fast. Everything "just works" and is a single page without clutter - exactly how I like it.