Back not working

Hey does anyone know what happened to this site: ? When I try to use it, it doesn't do anything. Before it used to work fine. I tried to email the webmaster and never heard anything.
I've just checked and the service in charge of doing the conversion ( is broken on the server side ¹.
So it's up to its webmasters to fix it. You already reported it, so there isn't anything else you can do (apart from keeping trying to contact them).

(¹) It returns a mix of Java garbage and the source code of a perl script, instead of the JSON data it is supposed to. Technically speaking, I'm guessing it's serializing the wrong object for some unexpected reason (like an automatic update of Java to a new version or something like that).