Setting ES6 as standard javascript compiler in a local jsbin.

[ClemensBasler]

Hi,
I hope thats the right place to ask questions like this:
At the moment I'm running a local version of jsbin on a server. For internal code I use the the injection with the url like internalserver:3000/?html,js,output&html=mysecretcode&js=secretjscode. That's super useful, but now I need the javascript to be direclty set to es6. Something like this is what I need: internalserver:3000/?html,js,output&html=mysecretcode&es6=secretjscode.
Also setting the whole jsbin by default to es6 compilation would be option.
I would be super thankful, if someone could help me, but I also understand, if that's not the right place for such questions. Thank you :)