You are right luigi16mametchi, binary's enwarehouse is very similar. But it only works on Windows ... and I have a mac. I wrote this online version so that I can access it from any machine / anywhere.
I was looking for codes for tamagotchi 5.5 (celebrity). Since I was not happy with the results, I created a simple web page that does the work. It is at:
tamacode.appspot.com
Hope this helps!
