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Piano chords, scales & theory.

An open reference for piano: chords, scales, theory & ear training.

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Play something — I’ll name it.
Hold two notes for an interval, three or more for a chord.Tap keys or play A–; on your keyboard · sound on
Try:C♯m7D dorianE♭maj7A harmonic minor

The index

Find any chord, scale, or mode

Search it the way you say it, or pick a key and go.

Popular right nowD♯ MajorF♯ MajorF♯ Minor 7thA♯ MajorD Minor / GB Minor 7thC Dominant 7thE Dominant 7th
CC♯D♭DD♯E♭EFF♯G♭GG♯A♭AA♯B♭BC♭
Chords43 types in every keyBrowse chords →Scalesmajor, minor, pentatonic, bluesBrowse scales →ModesIonian through LocrianBrowse modes →Key signaturessharps, flats, relativesKey signatures →Progressionscadences, ii–V–I, pop changesProgressions →

Learn & practice

Chord Finder

Type any chord symbol and play it on the keyboard.

Open tool →Chord & Scale Mastery

Two editorial series, from your first triad to altered chords and exotic scales.

Start the series →Practice Room

Connect MIDI and drill chords and scales with feedback that grades how you play.

Enter the room →Circle of Fifths

The interactive map of every key and how they relate.

Explore →
One-time purchase · no subscription required

The Piano Deck

Fifty-two cards that teach the patterns behind every chord you play. Work through one a week, own them for life.

Explore the Deck →

Go deeper

Where should you start?

A short placement check maps your skills across 13 domains and recommends what to practice next.

Take the assessment →
Songs, explained

Step-by-step guides to classic piano pieces, chord by chord.

Browse songs →
For creators

Keyframe turns your playing into an on-stream keyboard overlay for YouTube and Twitch.

See Keyframe →