BPM & Key Detector
Tempo and musical key, estimated directly from the audio — tempo via autocorrelation of the track's onset pattern, key via the standard Krumhansl-Kessler chroma-profile method. Both are confidence-gated: when a track's rhythm or pitch content isn't clear enough to estimate reliably, this page says so instead of guessing.
DROP YOUR TRACK
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WAV, MP3, AIFF, or FLAC · up to 200MB. Nothing is used for model training — see our privacy notice.
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Analyzing — running the same measurement pass as Track Analyzer…
Tempo & Key
Waveform
Drawn locally in your browser from the file you selected — not sent anywhere to render this.
What this is: BPM & Key Detector reads the exact same measurement Track Analyzer already computes on your file in one pass — this page just gives that one result its own focused view. Want the full picture (loudness, dynamics, mix health, frequency balance, and more, all at once)? Open Track Analyzer →
Want loudness, mix health, and frequency balance too?
Track Analyzer runs the full measurement pass — one free upload, every result at once.
Open Track Analyzer