Accurate Online Song BPM & Tempo Detector
Analyze the tempo of your audio tracks with onset envelope autocorrelation. Features confidence scores, half-time and double-time alternatives, and live tap tempo synchronization.
Upload your MP3 file
Drag & drop your file here, or click to browse (up to 25MB)
.MP3.WAV.MID.XML
Estimated Tempo
120BPM
Beat Interval: 500 msFrequency: 2.00 Hz
Click repeatedly to calculate tempo
Interactive Piano Roll (0 Notes)Click • Drag • Resize • Play
0 notes | BPM: 120
Click empty space to add notes • Drag to move • Drag right edge to resize • Press keys to auditionSelection: None
Ready to export your processed arrangement:
How to Use BPM Detector
Complete Illustrated Guide →- Upload an audio file (MP3 or WAV).
- The engine analyzes the rhythmic onset energy and calculates the fundamental beat period.
- Review the detected BPM, confidence score, and beat markers on the waveform.
- Use the Tap Tempo button to manually confirm or refine the timing.
Key Capabilities
- Spectral flux onset novelty curve calculation
- Autocorrelation across the full musical tempo range (50 to 220 BPM)
- Sub-beat marker visualization synchronized to audio playback
- Integrated millisecond-precision Tap Tempo counter
Technical Specifications & Acoustic Limitations
BPM detection analyzes transient peaks and rhythmic periodicity. Steady beats in standard meters detect readily, while songs featuring tempo rubato, extensive ritardandos, or ambient intros may require selecting an active rhythmic section for optimal analysis.
Frequently Asked Questions
What if a song has half-time or double-time feel?↓
The detector automatically provides both half-time and double-time candidates alongside the primary detected BPM for genres like trap, drum & bass, and ballads.
Input & Output Formats
Supported Inputs:
MP3WAVOGGWebM
Supported Outputs:
BPM ValueHalf/Double Time CandidatesBeat Grid Markers
DAW Compatibility: Ableton, FL Studio, Logic Pro, Cubase, MuseScore, Sibelius.
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