Chord Builder

Build any chord from a root, name and inversion; see the notes on a piano keyboard and a guitar fretboard, and play them.

Chord catalogue

Triads (major, minor, diminished, augmented, sus2, sus4), 6ths, 7ths (dom7, maj7, m7, m7♭5, dim7, aug7), extended (9, maj9, m9, 11, 13), add9, power chord. Each chord is a set of semitone offsets from the root.

Inversions

Inversion k rotates the lowest k notes up an octave. The note name and the highlighted MIDI keys reflect the actual pitches; the fretboard shows pitch classes (every position where a chord tone falls).