Piano Keys

Free tool

Piano chord identifier

Play three or more notes on the keyboard below and this tool works out what chord they form, including when the notes are in a different order from the textbook shape. It reads a MIDI keyboard if you have one connected, and works with mouse or touch if you do not.

Play three or more notes

Nothing held yet

Checking for MIDI…

Click the keys to add notes. Inversions are recognised, so any order of the same notes gives the same answer.

Questions

Common questions

Can it recognise inversions?

Yes. C, E, G and E, G, C and G, C, E are all identified as C major, because they contain the same notes.

How many notes does it need?

Three for a triad, four for a seventh chord. Two notes is an interval rather than a chord, so it will say so.

Does it work with a MIDI keyboard?

Yes, if your browser supports Web MIDI. Plug in and play the chord.