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BPM Tapper
Estimate tempo from your taps using the median of recent accepted beat intervals.
Native pointer or focused-button keyboard taps
Visible BPM estimate, JSON tap report
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
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How to use this tool
- Select Tap beat at least twice, or focus it and press Space or Enter with the beat.
- Read the accepted-tap count and BPM. Very fast taps are ignored; after a gap over three seconds the next tap starts a new sequence.
- Choose Download tap report to save bpm-taps.json, or Reset to clear the sequence.
Examples
Accepted intervals of 500, 500, 490 and 510 milliseconds have a median of 500 milliseconds and yield 120 BPM.
Limitations
- Keeps the last 64 accepted monotonic timestamps and at most 63 intervals. Intervals below 200 ms are ignored without moving the accepted anchor; a gap strictly over 3000 ms starts one new tap.
- BPM is 60000 divided by the median interval; an even-count median averages its two middle values. The displayed value has two decimals; JSON retains full numbers and relative timestamps.
- The admitted interval range yields a 20–300 BPM estimator. This is manual estimation, with no recorded-song beat detector, metronome, MIDI or timing accuracy guarantee.
- JSON report up to 16 KiB. No sound starts, no audio input is requested, and Reset or leaving the tool clears active state.
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