Musical Key Detector
Detect the key of any song with Camelot wheel notation. The DJ-friendly way to find harmonic neighbours.
Drop your audio file here
or click to browse a file
Best on tonal music with a clear key — pop, rock, electronic.
About this key detector
Detects the musical key (e.g., C major, A minor) by analysing the song's tonal content and matching it against musical key templates. The result includes both the standard music-theory notation (e.g., 'A minor') and the Camelot wheel position (e.g., '8A') used by DJs for harmonic mixing.
Best on songs with clear tonality — most pop, rock, electronic. Atonal music, classical, and jazz with frequent modulations may produce unreliable results.
How to detect the key of a song
- 01
Drop in audio
MP3, WAV, FLAC — common audio formats.
- 02
Wait for analysis
Tool decodes the audio, analyses tonal content across the song, and matches against key templates.
- 03
Read the result
Shown both as music notation (e.g., 'F# minor') and Camelot position ('11A').
Why use this key detector
- Proven musical-key detection algorithm
- Output in both standard notation and Camelot wheel
- Suggests harmonic neighbours (Camelot ±1, ±1 across major/minor)
- Free, private, no install
- No watermark, no signup, no length cap
- Useful for DJs preparing sets, producers checking samples, music students
Key detector FAQ
What's the Camelot wheel?
A DJ-friendly notation for musical keys. Adjacent positions on the wheel sound harmonious together. 8A → 8B is a relative-major/minor swap; 8A → 9A keeps the mode and goes up a fifth.
How accurate is it?
On clear-tonality pop music, around 80% on the right key and 95% on the right or relative key. Modal music, jazz with modulations and vocal-only tracks score lower.
Why does it sometimes pick the relative minor instead of the major?
The major and its relative minor share all 7 notes, so the tonal profile is identical. The algorithm picks based on which scale-degree gets the most weight; close calls can swing either way.
Is my file kept private?
Yes. We don't analyse or index your file beyond returning the key result.
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