Glowtrack Studio Song Key Finder

Song Key Finder

Find the musical key of any song — with its Camelot code, relative key and the keys it mixes with. Free, in your browser. Drop in several songs at once; nothing is uploaded.

Drop songs here, or click to choose MP3, WAV, FLAC, M4A, AAC or OGG · several at once is fine
Songs can feel like half or double their tempo — pick a range to steer the result.
No file? Tap the tempoTap the button (or press T) along with the beat — 8 taps or more gives a solid reading.
— BPM
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How it works

  1. Drop in your songsMP3, WAV, FLAC, M4A or OGG — one or a whole playlist.
  2. Read the keyThe key (such as A minor), its Camelot code (8A), the relative major or minor and how confident the result is.
  3. Mix or play alongSee which keys blend harmonically, and play the song to check by ear. Tempo comes free.

Keys, explained

Major and minorEvery song centres on a home note and a scale. Major keys tend to sound bright, minor keys darker.
Relative keysEvery minor key shares its notes with a major key — A minor and C major, for example. They’re easy to confuse, so both are shown.
Camelot codesDJs number the 24 keys 1–12 with A for minor and B for major. Neighbouring numbers mix smoothly. See the Camelot wheel.
Singing alongKnowing the key helps you transpose for your voice, find chords, or pick a backing track.

FAQ

Is my song uploaded?

No. Everything is analysed inside your browser on your own device. Your audio is never sent anywhere, so it’s safe for unreleased masters.

How accurate is the key finder?

It’s right for most songs with a clear tonal centre. Songs that change key, use unusual modes, or sit between a minor key and its relative major can go either way — when it’s unsure, it shows the runner-up too.

How does it work?

It measures how much of each of the 12 notes is present across the song (a chromagram), corrects for tuning that isn’t quite standard, then compares the result with key profiles from music research.

What is the Camelot code?

A simple numbering of keys for harmonic mixing. Tracks with the same code, one number either side, or the same number with the other letter mix without clashing.

Can I find the key of a song from YouTube?

This tool works with audio files on your device. If you have the song as a file, drop it in.

Does it find the tempo too?

Yes — the BPM appears alongside the key, with ×2 and ½ buttons for half- or double-time.

Is it free?

Yes — free, with no sign-up, supported by the ads on the page.

More free tools

Camelot wheelInteractive chart of all 24 keys for harmonic mixing. BPM & key finderTempo first, with click track and tap tempo. Slowed + reverb makerChange a song’s speed and pitch.