Keys at Random
Welcome to this dinky tool! It goes through all 12 keys at random; I use it to practice scales, chord types, etc. without developing muscle memory of moving around the circle of 5ths or some other pattern.
If your MIDI keyboard is plugged in when accessing this page, the lowest A on the keyboard will go to the next key and the highest C will restart. Also, if you use Chrome or Firefox, the computer will speak to you so you don‘t have to look at the computer screen to see what key it is. :)