Free BPM & Key Finder
Upload your music file to instantly detect BPM (tempo), key, and scale. Perfect for DJs and music producers. 100% free, no uploads to server - all analysis happens in your browser.
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Lightning Fast
Get results in seconds with browser-based analysis
100% Private
Your files never leave your device. All analysis is done locally.
Professional Accuracy
Powered by Essentia.js - trusted by music professionals worldwide
Lightning Fast · 100% Private · Professional Accuracy
Professional music analysis tool trusted by DJs and producers worldwide
Lightning Fast
Get results in seconds with browser-based analysis
100% Private
Your files never leave your device. All analysis is done locally.
Professional Accuracy
Powered by Essentia.js - trusted by music professionals worldwide
Multiple Audio Formats
Support for MP3, WAV, FLAC, M4A, AAC, and OGG
BPM Detection
Accurate tempo detection from 30-300 BPM
Key & Scale Detection
Identify musical key and scale (Major/Minor)
Camelot Wheel Notation
Get Camelot codes for harmonic DJ mixing
CSV Export
Download analysis results in CSV format
No Registration Required
Free to use, no account needed
Frequently Asked Questions
Everything you need to know about BPM and Key detection
What is BPM and why is it important?
BPM (Beats Per Minute) measures the tempo of a song. It's essential for DJs to match song speeds for seamless mixing, and helps producers sync tracks in their DAW. Our tool accurately detects BPM from 30-300 BPM range.
How does key detection help with DJ mixing?
Mixing songs in compatible keys creates harmonic blends that sound natural and professional. We detect the musical key (C, D, E, etc.) and scale (Major/Minor), plus provide Camelot Wheel notation - the industry standard for harmonic mixing that makes it easy to find compatible tracks.
Is my music file uploaded to your servers?
No! All analysis happens 100% locally in your browser using Web Audio API and Essentia.js. Your files never leave your device, ensuring complete privacy and faster processing. This also means no file size restrictions from server uploads.
What audio formats are supported?
We support all major audio formats: MP3, WAV, FLAC, M4A (AAC), and OGG. Maximum file size is 100MB. For best results, use high-quality audio files - better audio quality leads to more accurate BPM and key detection.
Start Analyzing Your Music Now
Free BPM and Key detection for DJs and music producers. No registration required, 100% private.