Free Online Key & BPM Finder
Upload any audio file to instantly discover its musical key, BPM, and Camelot wheel notation. Perfect for DJs, producers, and musicians. 100% free and private.
100% private — your audio never leaves your device
Drop your audio file here
or click to browse
Supports MP3, WAV, FLAC, OGG, M4A · Max 50MB
The Camelot Wheel
The Camelot Wheel maps every musical key to a simple number-letter code. Tracks with the same number, one number up or down, or the same number with the opposite letter (A/B) will mix harmonically. Our finder shows this notation automatically so you can build seamless sets without music theory knowledge.
How Our Key & BPM Finder Works
Our key and BPM finder uses advanced audio analysis algorithms to detect the musical key and tempo of any song in seconds. Simply upload your MP3, WAV, or FLAC file, and our tool will analyze the audio directly in your browser.
Unlike other tools, everything runs entirely on your device using Web Workers and the Web Audio API. Your music stays private, processing is instant, and it works even without an internet connection after the page loads.
Upload
Drop any audio file
Decode
Web Audio API reads it
Analyze
FFT + chroma detection
Results
Key, BPM & Camelot
Harmonic Mixing Made Easy
Match Camelot codes to create flawless transitions between tracks. Same number = perfect mix. One up or down = smooth blend.
Perfect for DJs & Harmonic Mixing
Find the key and BPM of tracks to create seamless, harmonic mixes. Our key & BPM detector shows Camelot wheel notation to help you find compatible tracks that mix perfectly together.
The Camelot Wheel makes it easy to mix tracks that are the same number, one number up or down, or the same number with a different letter. No more guesswork — just perfect harmonic transitions every time.
Essential Tool for Music Producers
Quickly identify the key of vocal samples, loops, and instrumentals. Our vocal key finder helps you match vocals with your beats for professional-sounding productions.
After analyzing your track, browse vocals in the same key from our marketplace. Find compatible vocals for your productions in seconds — save hours of searching and get straight to creating.
Match Vocals to Beats
Analyze your instrumental, then find acapella vocals in the exact same key. No pitch-shifting needed — just drag, drop, and produce.
Why Choose Our Song Key & BPM Finder?
Instant Analysis
Get results in seconds with our optimized algorithm
High Accuracy
Professional-grade detection for reliable results
100% Private
All processing happens in your browser, nothing uploaded
Camelot Wheel
Perfect for DJs doing harmonic mixing
Multiple Formats
Supports MP3, WAV, FLAC, OGG, M4A
Free Forever
No registration, no limits, no fees
Mobile Friendly
Works on phones, tablets, and desktop