BPM Detector Online Free — Find Song Beats Per Minute Instantly
Find beats per minute — Audio analysis + Tap BPM counter
Find the exact BPM of any song using browser-side audio analysis. Upload your MP3 or WAV file and get the beats per minute with a confidence score in seconds. Also includes a tap BPM tool for manual counting.
Drop audio file to detect BPM
MP3, WAV, OGG — analyzes first 60 seconds
🎵 Tap BPM
Tap the button on every beat to calculate BPM manually
• Tap on every beat of the song
• 8+ taps gives most accurate result
• Auto-resets after 3s of inactivity
Tempo Reference
How the BPM Detector Works
The tool uses the Web Audio API to analyze energy peaks in 10ms windows across the audio. Beat onsets are detected where energy exceeds the average threshold. Inter-onset intervals are clustered into a BPM histogram to find the dominant tempo. The analysis runs on the first 60 seconds for speed.
Frequently Asked Questions
How accurate is the BPM detection?
The energy-based onset detection algorithm is accurate for most music styles with clear beats. Confidence score indicates reliability. Classical and jazz may score lower.
What is the BPM range it can detect?
The detector works well for BPMs between 60 and 180. Very slow or very fast music may be detected at half or double the actual tempo.
What is the tap BPM tool?
Click the Tap button on every beat of the song. After 8+ taps, the average BPM is calculated — useful when audio analysis gives uncertain results.
Is my audio uploaded?
No. The Web Audio API analyzes your file locally in the browser. No audio data is sent to any server.
Can it detect BPM from a live microphone?
Not currently. BPM detection works on uploaded audio files. Live mic tap BPM is available via the tap tool.