Accurate within 1–2 BPM on tracks with a clear beat. Acoustic or highly syncopated material may return half- or double-time estimates.

Can it detect tempo changes?

No. This version returns a single global BPM. Splitting the file and running detection per section is a workaround.

What BPM range does it scan?

60–200 BPM. Outside this range, try halving or doubling the result manually.

BPM DetectorLocal

Detect the tempo of your audio files. Upload a track and get an instant BPM estimate with confidence level.

Drop an MP3 or WAV file here

or click to browse

⎆Your audio never leaves your browser. All processing happens locally.

How to use BPM Detector

Drop an audio file
Any MP3 or WAV works. The tool decodes it into an AudioBuffer.
Run detection
Click Detect. The algorithm builds an energy envelope, finds onsets, and computes the dominant interval.
Check confidence
A confidence bar shows how tight the peak spacing is. Low confidence usually means ambiguous rhythm.
Use the result
Copy the BPM for your DAW, DJ software, or just for curiosity.

Frequently asked questions

How accurate is it?: Accurate within 1–2 BPM on tracks with a clear beat. Acoustic or highly syncopated material may return half- or double-time estimates.
Can it detect tempo changes?: No. This version returns a single global BPM. Splitting the file and running detection per section is a workaround.
What BPM range does it scan?: 60–200 BPM. Outside this range, try halving or doubling the result manually.