What is BPMKeyFinder?
BPMKeyFinder is a web-based tool that analyzes the tempo (BPM) and musical key of audio files directly in your browser. All processing occurs locally using the Essentia.js engine, so your tracks never leave your device, ensuring complete privacy for sensitive or unreleased music.
The analysis delivers practical BPM normalized to the typical DJ range (60–180), standard musical key notation, Camelot wheel compatibility codes, major/minor mode, and a confidence score to gauge detection reliability. You can batch-queue multiple files for back-to-back analysis and, with a Pro plan, export results to CSV for syncing with DJ software like rekordbox or Engine DJ.
The responsive interface works on laptops, tablets, and phones, making it convenient for quick checks in the studio, at the booth, or on the go. Sample results illustrate the clear output format, helping you plan harmonic transitions with confidence.
How to use BPMKeyFinder
- 1
Drag and drop or select an audio file in MP3, WAV, FLAC, AIFF, AAC, or OGG format.
- 2
Wait a few seconds while the browser analyzes the track locally using Essentia.js.
- 3
Review the results: BPM, key, Camelot code, mode, duration, and confidence.
- 4
Optionally, export the data as CSV (Pro) or analyze another track.
Key features
Local in-browser analysis: your audio files never leave your device, ensuring complete privacy.
Detects BPM (tempo normalized 60–180), musical key, and Camelot wheel code for harmonic mixing.
Provides a confidence score for key detection to gauge result reliability.
Batch-friendly workflow: queue multiple files for sequential client-side analysis.
CSV export (Pro) to sync metadata with DJ software like rekordbox or Engine DJ.
Use cases
- Touring DJs checking tempo and key of new tracks before live sets to plan seamless transitions.
- Music producers aligning samples and stems to the project grid and verifying harmonic compatibility.
- Choreographers and dance instructors obtaining accurate BPM for class routines.
- Post-production editors vetting stems and exporting confidence data for cue sheets.
- Educators demonstrating music analysis concepts without needing expensive software.
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Frequently asked questions about BPMKeyFinder
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