Keyboard Checker is a simple website where users can check whether all their keyboard keys work properly.
It is of use when people are in doubt whether their keys are broken, particularly with keys that are not so easily tested like F1 to F12 or Scroll Lock, and Insert.
Also comes in handy when you get a new keyboard and want to make sure it works alright.
you should charge for this app
very good
Does what it says!