Piano chords and scales: every chord, highlighted

Pick the root note and the chord type, and the keys light up with the formula (for example R, M3, P5, M7) and the exact notes. Switch inversions to see the other shapes.

No. Play on the virtual keyboard with touch or mouse. MIDI is only needed for the Detector mode, which names chords you play on an external keyboard.

It looks at the notes you hold and names the chord from the lowest note. If the lowest note is the root you get the plain name (A3, C4, E4, G4 reads Am7); if not, a slash chord (E3, G3, A3, C4 reads Am7/E). It needs at least three different notes and uses sharps.

Major, minor, 7th, diminished, augmented, suspended and extended chords, plus major and minor scales, the modes, pentatonics, blues, whole tone, diminished and chromatic. Each shows its formula and notes.

The built-in sound is a simple synthesised tone, not a sampled grand piano. The Sound button turns all built-in audio off so you can play through your own instrument.

Yes. Scales show the step pattern, and step colours can be shown on the keys.

Yes: the UI accent, the key highlight and the colour for played notes. Settings save automatically in your browser.

Yes. The keyboard supports multi-touch so you can play chords on a phone or tablet.