Online BPM Detector is a tool used to detect beats per minute in audio files. It calculates the BPM value by analyzing rhythmic characteristics of the audio. Users can upload audio files to obtain their BPM readings.

However, the BPM detector has inherent limitations: multi-rhythm fusion, inconsistency between drum beats and melodic rhythms, or lack of clear beats in pure instrumental/electronic music may lead to misjudgments. Therefore, results should be considered indicative. For more accurate BPM values, calibration with tools like metronomes is recommended.