How to Find Key and BPM in 3 Steps
- 1
Upload audio or drag in batch
Drop in one or multiple WAV, MP3, FLAC, M4A, or OGG tracks. Files are decoded locally on your device.
- 2
On-device spectral analysis
Web Audio DSP computes 12-bin Chroma vectors and onset-energy autocorrelation in real time.
- 3
Read key, Camelot & BPM
View musical key, Camelot wheel notation (e.g. 11A), BPM, and local energy metrics instantly.
Everything this tool gives you
Dual Key & Tempo Detection
Extract musical root key, major/minor scale, and precise BPM simultaneously from a single on-device audio decode pass.
- 12-bin Chroma vector pitch-class matching
- Onset-energy autocorrelation for sub-BPM accuracy
3D Camelot Wheel Harmonic Mixing
Harmonize your DJ sets with visual Camelot Wheel notation (e.g. 8A, 11B). Easily identify adjacent keys for clashing-free harmonic transitions.
- Instant Camelot code mapping (1A to 12B)
- Visual guide for harmonic key transitions
100% On-Device DSP & Unlimited Batch Queue
Process dozens of audio files in a single batch with zero latency. Everything runs inside your browser memory with zero server uploads.
- Zero audio uploads for complete unreleased track privacy
- Batch analysis queue with multi-format support
Four High-Impact DJ & Producer Workflows
From live harmonic mixing to sample library tuning, engineered for modern music creators.
Harmonic DJ Set Mixing
Match tracks along the Camelot Wheel (e.g. 8A to 8B or 9A) to build seamless transitions without key clashes.
Sample & Loop Pitch Alignment
Identify sample root notes and BPM to quickly pitch-shift and time-stretch loops into your project key.
Batch Track Library Tagging
Drag and drop 20+ tracks at once to analyze and organize your playlist by tempo and harmonic compatibility.
Vocal Track Key Transposition
Check vocal recording keys to transpose backing tracks and instrumentals to perfectly fit singer vocal ranges.
Why DJs & Producers Choose Musiclly
Camelot wheel harmonic mixing, sub-millisecond tempo tracking, and zero-upload on-device DSP privacy.
100% Free & Unlimited
Powered entirely by your browser hardware with zero credits, subscriptions, or login requirements.
Zero Upload Privacy
Audio is decoded and analyzed locally in memory. Unreleased tracks and demos never leave your device.
Camelot Wheel Ready
Directly outputs standard Camelot Wheel notation for effortless DJ set transitions and mashups.
Multi-Format Batch Queue
Analyze multiple WAV, MP3, FLAC, M4A, and OGG files sequentially without server queue delays.
Key and BPM Finder FAQ
Yes — it is 100% free with no limits on the number of songs or batch files you can analyze. Because all digital signal processing runs locally in your browser, there are no server costs, credits, or registration gates.
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Detect Key and BPM of Any Song
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