I don't mean this specifically about your site, but most of the sites like these where the user is trying something new, don't put a barrier asking for an email

I don't mean this specifically about your site, but most of the sites like these where the user is trying something new, don't put a barrier asking for an email and expecting him to register. Allow him to start using your tools right away and then if he deems it worthy he'll register anyway since he needs to save the damn thing. Right now, all I did was go to 10minutemail.com and grab a temporary email. Look I get it you're a new service and you promise to never never ever spam me. But after being burnt a thousand times no sensible user in his sane mind would give you his email address that easily. Allowing one to try before registering may increase coding complexity, but it'll drastically lower the barrier.