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BeatKey
Detect BPM & Musical Key
Drop an audio file to instantly analyze tempo and key.
100% private — everything runs in your browser.
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Drop an audio file here
or click to browse
MP3, WAV, FLAC, OGG, AAC · Max 50 MB
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Instant Analysis
Results in under 5 seconds for most tracks
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100% Private
Your files never leave your device
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BPM + Key
Tempo, key, beat positions, and confidence