Free tool
Runs entirely in your browser. Drop a track to estimate its beats per minute, or tap along to count the tempo by ear — perfect for DJ sets, remixes, practice and sync work. Nothing is uploaded.
Try it
The fastest way to read a track's tempo without installing anything.
MP3, WAV, OGG, M4A — up to 25 MB. We'll estimate the tempo in your browser.
Or tap the tempo
Tap the button in time with the music — we average your intervals into a live BPM.
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Tap at least twice to start counting.
How it works
The detector uses your browser's Web Audio API to decode the file, build an energy envelope of the beat, and find the most likely tempo — all on your machine, no server round trip.
Step 1
MP3, WAV, OGG, M4A or FLAC — up to 25 MB.
Step 2
The track's rhythmic energy is analyzed in your browser.
Step 3
Get an instant estimate, or tap along to confirm it.
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