TuneLab
BPM & Key Finder
Detect the exact tempo and musical key of any song in one step. Runs on your device — files never uploaded.
Drop audio file here or click to browse
Max 30MB · MP3, WAV, FLAC, OGG, M4A
Private — processed on your device, never uploaded
How to Find BPM & Key
- 1 Upload an audio file (MP3, WAV, FLAC, OGG, M4A)
- 2 Neural networks detect tempo and key simultaneously on your device
- 3 Get BPM and Camelot code for beatmatching and harmonic mixing
Frequently Asked Questions
How accurate is the BPM and key detection?
BPM detection uses a neural network ensemble with 1 BPM accuracy. Key detection uses a custom convolutional neural network trained on 50,000+ tracks. Both run locally via WebAssembly.
Why combine BPM and key in one tool?
DJs and producers almost always need both — knowing the tempo without the key (or vice versa) means loading the file into a second tool. This page runs both analyses in parallel on a single upload.
Is my audio uploaded to a server?
No. Both neural networks run entirely on your device via WebAssembly. Your files never leave your machine — not even temporarily.
