Key Codes is a little utility that displays the key code, unicode value, and modifier keys state for any key combination you press. If you're a developer, this might be useful to you.
Added a popover that breaks modifier flags down into known constants and their values.
Most Helpful Reviews
Indispensible - If you do anything involving modifier codes, key codes, hot keys, etc, then installing Key Codes should be a no-brainer. It's definitely earned its spot amongst my developer tools.
not all keys - The app reports most standard keys; however, the play/pause keys and the volume control keys, etc., do not show up.
More Reviews for Current Version
Incredibly useful tool - Great app; I've been wanting something like this for a long time. Plus it's free!
Great tool - Haven’t used other versions, but this does exactly what it needs to do - saved me hours of programming a utility to do soemthing similar (and not nearly as well). Thank you
excellent - does just what it says. Thanks!