[Detrus]

"Paste" is not an intuitive synonym for "run." If you type or paste some code, you've already pasted. In JSBin it's render. You should just say run.

Also it's always forking, maybe I just want to edit the current without changing the URL.

[gf3]

Thanks for the feedback @Detrus! I plan on adding a "Run" functionality that can be used before "Saving"/"Pasting". As for editing, that might come down the line if I add something like BrowserID for signing up/in.