How it works
- Drop your audio file. MP3, WAV, FLAC, OGG or M4A up to 50 MB.
- Let the analysis run. Your file is sent to our servers and analyzed with Essentia in a few seconds, then deleted right after.
- Read your key. The detected key is shown with its Camelot code, a confidence score and the diatonic chords of the key — one click to hear each.
Features
- Accurate server-side analysis. Your track is analyzed with Essentia — a well-regarded audio-analysis engine — then deleted right after. It isn't stored or shared.
- Whole-track analysis. The entire song is analyzed, not just a snippet, so an intro riff or a breakdown can't dominate the result.
- Camelot code for DJs. Every result comes with its position on the Camelot wheel, ready for harmonic mixing.
- Confidence score & diatonic chords. Every result comes with a confidence score, and the diatonic chords of the key are one click away to play.
FAQ
Is this key finder free?
Yes. Anonymous users get 5 free analyses per day across AudioKit's free tools — no account needed. If you need more, AudioKit Premium removes the daily limit. There's no watermark and no feature lock: the free analysis is the full analysis.
Is my audio file uploaded to a server?
Yes — and only briefly. To detect the key reliably, AudioKit uses Essentia, an audio-analysis engine that runs on our servers: your file is sent there, analyzed, and deleted right after. It isn't stored or shared, and an anonymous counter tracks your daily free quota.
Which audio formats are supported?
MP3, WAV, FLAC, OGG and M4A files up to 50 MB. That covers everything from a quick phone bounce to a full-length lossless master. If your file is in another format, run it through our free audio converter first.
How accurate is the key detection?
AudioKit uses Essentia, a well-regarded audio-analysis engine, to analyze the whole track. Clearly tonal music is detected reliably, and every result comes with a confidence score so you know how sure the analysis is. Statistical key detection still has intrinsic limits on ambiguous or atonal material — a close call between two keys (often relatives) can still be tricky.
What is Camelot notation?
Camelot notation maps the 24 major and minor keys onto a clock-style wheel, numbered 1 to 12, with A for minor and B for major — 8A is A minor, 8B is C major. DJs use it for harmonic mixing: tracks whose codes match or sit one step apart on the wheel blend together without clashing. AudioKit shows the Camelot code right under the detected key.