Experimental local analysis
Free Song Key Finder
Estimate a likely major or minor key from up to the first 30 seconds of audio. Analysis runs in your browser and should be verified by ear.
Key detection is an estimate. Modulations, weak harmony, percussion-heavy intros and short samples can produce uncertain results.
Choose a tonal section of a permitted file. Nothing is uploaded.
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Pitch-Class Energy
When a Key Estimate Helps
A likely key can help a singer choose warmups or a player locate starting chords. This first version uses local spectral analysis and tonal profiles, so it is a starting hint rather than a promise of production-grade detection.