How to find a song's key
- Drop a track into the upload panel — MP3, WAV, FLAC and other common formats are supported.
- Wait a few seconds while the key and tempo analysis runs on your device.
- Read the big result cards: musical key, Camelot code and BPM.
- Use the compatible-keys chips to line up your next track for a smooth, harmonic transition.
This song key finder detects the musical key and scale of any track and converts it to a Camelot code, the shorthand DJs use for harmonic mixing. Unlike a plain BPM tool, it leads with the key and then shows which neighbouring keys blend without clashing — same code, one step around the wheel, or the relative major and minor. Producers use it to match samples and loops to a project key, vocalists use it to pick a comfortable range, and karaoke fans use it to transpose backing tracks. Everything is computed locally in your browser, so it is private, instant and free, with no signup and no upload of your music.
FAQ
How do I find the key of a song?
Drop the audio file into the analyzer and it profiles the track's tonal content against major and minor key templates, then returns the most likely key — for example F# minor. You also get the matching Camelot code and the song's tempo in the same result.
What is the Camelot wheel and how does harmonic mixing work?
The Camelot wheel turns every key into a code like 8A or 5B. Two tracks blend without clashing when their codes match, differ by one number on the wheel, or share the number with the opposite letter — the relative major or minor. The tool lists those compatible codes so you can choose your next track.
How accurate is the key detection?
Key detection is statistical, so it is most reliable on harmonically clear, melodic music. Tracks that are heavily percussive, atonal or modulate between sections can return a less certain result, and relative major or minor keys are easy to confuse — always confirm with your ears before committing to a transition.
Is the key finder free and is my music uploaded?
It is free with no signup, and nothing is uploaded. The entire analysis runs in your browser with the Web Audio API, so even unreleased demos stay on your device and results appear within a few seconds.