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Chord Finder

Identify chords or find notes for any chord

Click, type (A-L keys), or use a MIDI controller to select notes

C
Intervals
R - M3 - P5
Formula
1 - 3 - 5
Chord Lookup

What is the Chord Finder?

The Chord Finder helps you discover and understand chords on the piano. Use Forward mode to see which notes make up any chord, or switch to Reverse mode to identify a chord by clicking its notes.

See intervals, scale degrees, and note names for every chord type — Major, Minor, Diminished, Augmented, Suspended, and all the 7th chord variants.

How To

How to use it

1

Find notes for a chord

In Find Notes mode, select a root note and chord quality. The keyboard highlights the notes and shows intervals.

2

Identify a chord

In Identify mode, click notes on the keyboard. The tool detects which chord you're playing and shows its name.

3

Listen and learn

Click Play to hear any chord. See the interval formula to understand how each chord is constructed.

Features

All the chords you need

11 chord types

Major, Minor, Diminished, Augmented, Sus2, Sus4, Major 7th, Minor 7th, Dominant 7th, Dim 7th, and Half-dim 7th.

Two modes

Forward mode looks up chord notes. Reverse mode identifies chords from the notes you play.

Hear every chord

Click Play to hear the chord with synthesized piano or pad sounds.

Frequently asked questions

When you click notes on the keyboard, the tool analyzes the pitch classes (note names regardless of octave) and matches them against all known chord formulas. It finds the best match and shows the chord name, including inversions (slash chords).

We support 11 chord types: Major, Minor, Diminished, Augmented, Suspended 2nd, Suspended 4th, Major 7th, Minor 7th, Dominant 7th, Diminished 7th, and Half-diminished 7th (m7b5).

Absolutely. The interval display shows you how each chord is built from its root note. Understanding intervals is fundamental to music theory, and this tool makes it visual and interactive.