Re: codepen || jsfiddle || jsbin

[aoeui]

I like it for similar reasons. All the others seem to have similar features and I like the Github login, which reminds me http://dabblet.com/ which I used to like a lot too but not using anymore.

To me it seems that all have HTML, CSS, JS and some preview ability.

What I am thinking and do not know (not so much experience with those other “sandboxes”) is any of these like superior somewhat to others or are those engines equal these days ?