Song Key & BPM Finder
Upload any song and instantly detect its musical key and tempo for mixing and production.
Click to upload or drag and drop
MP3, WAV, FLAC, M4A, AAC, OGG — up to 50MB
Why key and BPM matter
Every piece of tonal music sits in a key — a home note and scale the melody and chords are built around. BPMis how fast the track pulses. Together, they're the two numbers DJs and producers need before mixing, remixing, or layering two tracks.
Harmonic mixing — blending tracks with compatible keys — is what separates a set that flows from one that clashes.
Understanding Camelot notation
The Camelot Wheelrenames the 24 musical keys as numbers 1–12 followed by "A" (minor) or "B" (major). From any key, you can safely mix into the same number, the next number up, or the next number down.
Frequently asked questions
What is Camelot notation?
A numbering system for musical keys (1A–12B) mapping every key onto a wheel of harmonically compatible neighbours.
Why does BPM matter for DJs?
Matching or beat-syncing BPM lets two tracks play in time together.
What file formats can I upload?
MP3, WAV, FLAC, M4A, AAC and OGG, up to 50MB per file.