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Free · In-browser · No upload

Song Key Finder.

Drop a song to estimate its musical key, scale and Camelot code — plus nearby harmonic options for DJ transitions. Confirm by ear: relative keys and ambiguous tracks can be misclassified.

Before-and-after illustration of Song Key Finder: Unknown song becomes Key and scale result through Compare pitch classes.
Before → process → afterSee the signal story, then hear it in the workspace.

MEASUREMENT MAP

Key Profile Wheel

Turn a signal into evidence you can inspect. A useful analyzer connects the raw trace, the measurement window and a clearly labeled result without pretending that one number explains the whole recording.

Before-and-after illustration of Song Key Finder: Unknown song becomes Key and scale result through Compare pitch classes.
Unknown songCompare pitch classesKey and scale result
An analysis path: a bounded signal window produces comparable metrics and a visual trace while preserving the context needed to interpret them.
Open the full signal breakdownBest source, processing logic, limits and three-pass listening check
  1. Unknown song

    Start with the right material

    Rough DJ preparation, karaoke key checks and a first pass before harmonic mixing.

  2. Compare pitch classes

    Understand the transformation

    FFT-derived chroma energy is matched against Krumhansl-style major/minor profiles.

  3. Key and scale result

    Verify the usable result

    One estimated tonic, major/minor mode and corresponding Camelot code.

Key confidence

Where this workflow stops

Modal, atonal, changing-key and harmonically sparse tracks may be misclassified. Confirm by ear before transposing or performing.

THREE-PASS CHECK

Make the final decision by ear

  • Use the same window and settings when comparing two files.
  • Treat estimates as evidence, not as a substitute for listening.
  • Export or note the measurement context alongside the result.

How to find a song's key

  1. Drop a track into the upload panel — MP3, WAV, FLAC and other common formats are supported.
  2. Wait a few seconds while the key and tempo analysis runs on your device.
  3. Read the big result cards: musical key, Camelot code and BPM.
  4. Use the compatible-keys chips to line up your next track for a smooth, harmonic transition.

This song key finder compares a track's tonal profile with major and minor templates, then reports the most likely key and its Camelot code. It also shows neighbouring codes that DJs commonly try for harmonic mixing. The result is a statistical estimate, not a guarantee: relative major and minor keys, key changes and ambiguous material can be misclassified, and even a compatible Camelot code does not ensure every passage will mix cleanly. Everything is computed locally in your browser, with no signup or upload of your music.

Song Key Finder: quick answer and technical limits

Quick answer: A musical-key estimator that compares a track’s chroma profile with major and minor key templates and returns a Camelot label.

Best for
Rough DJ preparation, karaoke key checks and a first pass before harmonic mixing.
How it works
FFT-derived chroma energy is matched against Krumhansl-style major/minor profiles.
What you get
One estimated tonic, major/minor mode and corresponding Camelot code.

Know before you use it: Modal, atonal, changing-key and harmonically sparse tracks may be misclassified. Confirm by ear before transposing or performing.

Privacy: Selected audio is processed in this browser and is not uploaded to AudioWrench. Normal page assets can still be requested as described in the privacy notice. Privacy details →

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 keys into codes such as 8A or 5B and highlights commonly compatible relationships. Matching or adjacent codes can help narrow down transition choices, but they do not guarantee a seamless mix; arrangement, tuning and the specific musical passages still matter.
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. The selected song is analyzed on your device and is not uploaded to AudioWrench. Normal page assets can still be requested as described in the privacy notice. Results and runtime depend on the material and device.