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 564 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 signaturesEvery major and minor key, its signature and diatonic chords
- Common chord progressionsPop, jazz, blues and flamenco harmony in real keys
- Not sure what chord you're playing?Click notes on a keyboard and identify the chord
- Chords in every keyTriads and sevenths with diagrams, per key
- Train your earHear a chord, name its quality, build a streak
- Practice in time40 to 208 BPM with tap tempo
- New to chord diagrams?How to read the diagrams and formulas
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.