Chord Finder

Identify any chord by playing it into your microphone or selecting notes on an interactive piano keyboard. See the chord name, quality, inversions, intervals, and finger positions on both guitar and piano diagrams. All processing runs locally in your browser.

🔒 Your audio never leaves your device — 100% local processing, zero uploads. Chrome Firefox Safari Edge

Upload Audio

Microphone:

Sensitivity -50 dB

Detected Notes

Start listening to detect notes

Drop an audio file here or click "Upload Audio" above

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Root Note

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Bass Note

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Inversion

Root Position

Notes: Waiting for input...

Intervals: —

Guitar Chord Diagram

Piano Chord Diagram

Chords Identified 0

Notes Detected 0

Session Time 0:00

Space Start/Stop F Freeze C Calibrate M Toggle Mode P Play Chord X Clear Notes

How to Use the Chord Finder

Choose Your Input Mode

Select "Listen" to use your microphone and play a chord on your instrument, or choose "Manual" to click notes on the interactive piano keyboard. You can also upload an audio file for analysis.
Play or Select Notes

In Listen mode, strum a chord or play notes into your microphone. In Manual mode, click the piano keys for each note in the chord. The tool detects the pitch classes and begins identification immediately.
Read the Results

The chord name appears in large text along with the quality (Major, Minor, Diminished, etc.), root note, bass note, inversion, all notes in the chord, and intervals from the root.
View Diagrams and Play Back

See how to play the chord on guitar (fretboard diagram) and piano (highlighted keys). Click "Play Chord" to hear all notes together. Explore alternate voicings for different fingerings on guitar.

Frequently Asked Questions

How many chord types can this tool identify?

The Chord Finder recognizes over 30 chord types including major, minor, diminished, augmented, dominant 7th, major 7th, minor 7th, half-diminished, suspended 2nd and 4th, add9, 6th, 9th, 11th, 13th, and power chords. It also detects inversions.

Does this tool detect chord inversions?

Yes. The tool identifies when the bass note differs from the root and labels the inversion accordingly: Root Position, 1st Inversion, 2nd Inversion, or 3rd Inversion (for 7th chords). The bass note and root note are displayed separately.

Can I use this with my guitar or other instruments?

Absolutely. The microphone mode works with any instrument that produces pitched tones: guitar, piano, ukulele, violin, brass, woodwinds, and more. For best results, play the chord clearly and allow notes to sustain for at least one second.

What does the guitar chord diagram show?

The guitar diagram displays a 6-string, 5-fret grid with dots showing finger positions, barre indicators for barre chords, and X or O markers for muted or open strings. When available, alternate voicings show different ways to play the same chord.

Is my audio data private?

Yes. All chord detection runs 100% in your browser using the Web Audio API. No audio is recorded, transmitted, or stored on any server. The tool works completely offline once loaded.

Can I analyze audio files instead of using my microphone?

Yes. Click "Upload Audio" or drag and drop an audio file (WAV, MP3, OGG, FLAC) onto the drop zone. The file is decoded and analyzed locally in your browser. This is useful for identifying chords in recorded music.

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