BPM and key detector
Estimate BPM and musical key
Analyze an audio file in the browser and get heuristic tempo, key, confidence and detected energy peaks.
The result is a quick estimate for drafts; final music production should still be checked by ear.
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Browser-side media tools are useful for quick analysis, previews and lightweight exports.
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Large video and audio files may need time to decode; smaller samples work faster in the browser.
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When the result is a command, run it on a machine with the required media tools or model installed.
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Review generated WAV, PNG, CSV and command outputs before using them in production workflows.
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Fullscreen mode on tablets and desktops gives more room for waveforms, tables and video previews.
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For final broadcast, podcast or advertising delivery, verify results with professional media tools too.
Supported formats
This tool accepts these formats. Uncommon containers and modern web formats may be normalized or converted on the server before processing.
Audio
3GA
AAC
AC3
AIF
AIFF
AMR
APE
AU
CAF
EAC3
FLAC
KAR
M4A
M4P
M4R
MID
MIDI
MMF
MKA
MPC
MP2
MP3
MPGA
OGA
OGG
OMA
OPUS
QCP
RA
RMI
VOC
WAV
WEBA
WEBM
WMA
A damaged file or a non-standard codec can still fail even when the extension is supported.
