Audio Key Detector

Estimate the musical key of an uploaded audio file with local browser analysis.

Processing... 0%

Loading audio file

Sampling harmonic content

Building chroma profile

Ranking possible keys

When you need to understand a song progression or prepare a practice idea quickly, a full notation editor is often too much.

This tool runs in the browser and helps estimate keys, chords, or tuning without installing dedicated music software.

Treat the result as a musical guide: complex modulation and noisy recordings can still need a final ear check.

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Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

✓ Runs locally in the browser without sending music data to a server.

✓ Shows scale degrees, degree functions, and chord roles.

✓ Useful for quick arranging, rehearsal, and study work.