Free diagnostic tool

MIDI keyboard
key tester

Connect your MIDI keyboard and press each key. Working keys light up — dead keys stay dark.

No MIDI device detected

C3

D3

E3

F3

G3

A3

B3

C4

D4

E4

F4

G4

A4

B4

C5

D5

E5

F5

G5

A5

B5

C6

D6

E6

F6

G6

A6

B6

C#3

D#3

F#3

G#3

A#3

C#4

D#4

F#4

G#4

A#4

C#5

D#5

F#5

G#5

A#5

C#6

D#6

F#6

G#6

A#6

0Keys tested

0Currently pressed

0Total presses

4Octave range (C3–B6)

Note log

Press some keys to see the log.