MIDI keyboard test
Check that your keyboard works, key by key, right in your browser. Plug it in, click Start the test and press each key: it lights up on the piano below and every message appears in the list, with its velocity and channel. Nothing is installed, and the test only listens: it never sends anything to your keyboard.
Keys tested: 0. Green keys already worked.
Press any key, pedal or knob: every message appears here.
What the test shows
Note on / Note off: a key was pressed or released. If a key never shows up, it may be dirty or broken. Velocity (1 to 127): how hard you pressed. If it always shows the same number, velocity is turned off on your keyboard. Control change: pedals, knobs and sliders. Pitch bend and Pressure: wheels, and expressive keyboards like LUMI Keys and Seaboard.
Nothing happens?
Use Google Chrome or Microsoft Edge (Safari does not support MIDI in websites), allow MIDI access when the browser asks, and try another USB cable: some cables only charge. More fixes in keyboard not detected. Your keyboard works? See how to learn piano for free with it.