Seems to come up with an error if you accidentally put white space in front of the URL. Otherwise looks like a useful tool.
Was it a deliberate design decision to make it easy to access other people's reports (by just changing the number in the URL)? Obviously anybody could run any website through the tool, so there's not really anything private about it, but it still feels kind of weird. I've just had a fun 5 minutes seeing what everyone else has been running through it, which I'm not sure they'd all be happy about.
Possibly you could use a long random string instead?
Ooh fun indeed :) Yeah use a random string or cookie auth.
But, seriously I did think about using some hash or form of uuid, but long term plan is to let people make accounts.. for trending, and alerts..
but first, we're working on accuracy, then speed, and then usability.