Learn every piano chord, one key at a time.
A free reference for piano chords: see the notes on a keyboard diagram, hear how each chord sounds, and read a short explanation of what makes it work. No account, no ads, just chords.
Ways to find what you need
All 348 chords the site currently knows are live, from plain triads to thirteenth chords.
Browse by root note
Pick a starting note like C or F#, then see every chord type built on it.
Browse by chord type
Pick a chord family like minor 7th or diminished, then see it in all twelve keys.
Scales and key signatures
Every major and minor key, with its signature, scale notes and the chords that live naturally inside it.
Common chord progressions
See how chords string together in pop, jazz, blues and flamenco harmony, realized in real keys.
Not sure what chord you're playing?
Click the notes on an interactive keyboard and the chord finder tells you what chord they form.
New to chord diagrams?
A short guide to reading the keyboard diagrams and formulas used on every page.
See it
Every chord comes with a keyboard diagram showing exactly which keys to press, root note picked out in brass.
Hear it
Click play and a small synth built into the page plays the chord back, either as a block or one note at a time.
Understand it
Each chord shows its formula and a short, plain-language explanation of what gives it its particular sound.