Online piano keyboard

A free piano keyboard that names your chords

Play any keys and each note rises from the keyboard as you hold it. The panel above shows the notes you are holding and names the chord they make: major, minor, diminished and augmented triads, suspended chords, sixths, sevenths and add9, in every key. When the lowest note is not the root, the chord is shown over its bass, like Am7/G. Two different notes are named as an interval, like C–G, a perfect 5th.

Questions

Do I need a piano?

No. On a computer keyboard, A S D F G H J K L play the white keys from middle C, W E T Y U O P the black keys, and Z and X change the octave. You can also tap or click the keys on screen, with several fingers at once on a touch screen. For the full feel, connect a digital piano or MIDI keyboard over USB or Bluetooth.

Can I connect my digital piano?

Yes, in Chrome, Edge or Opera on a computer or Android. Plug it in with a USB cable, or pair it over Bluetooth, then choose Connect piano. Safari and iPhone cannot connect a piano, but the on-screen keys still work.

Which chords does it know?

Major, minor, diminished and augmented triads; sus2 and sus4; 6 and m6; 7, maj7, m7, m7♭5, dim7, m(maj7) and 7sus4; add9 and 6/9; and 9, maj9, m9, 11 and 13, in all 12 keys and every inversion. Notes in any octave count, so C3 E4 G5 is still C major. Each chord name links to its page in the chord library.