Key Finder: the key, BPM and Camelot code of any song.
- Nothing uploads
- Key, BPM & Camelot in one pass
- Re-checks of a song included for 30 days
Example result
In short
To find the key of a song, drop the song into the key finder above. It analyzes the harmony in your browser and shows its key (for example A minor), the Camelot code (8A), the Open Key code (1m), the relative key and the BPM, with a confidence meter. Each song costs 1 credit (about $0.15 or less); nothing uploads.
How it works
How to use the Key Finder
- 1
Drop your song
Drag a song into the key finder — WAV, FLAC, MP3 or M4A up to 200 MB and 10 minutes — or paste a file. Sign in once; each new song uses 1 credit.
- 2
Read the result
You get the musical key, Camelot and Open Key codes, the relative key and the tempo. If confidence is low, check Also likely.
- 3
Mix or play in key
Copy the Camelot code into your DJ software, find compatible keys on the Camelot wheel, or set your DAW project to match.
What the key finder shows you
Key — the tonal center and mode, such as F♯ minor. Camelot and Open Key — the same key as a DJ-friendly code (11A and 4m for F♯ minor), which most DJ software uses for harmonic mixing. Relative key — the major or minor key built from the same notes (A major).
Confidence — how clearly one key beat the others. Also likely — the second and third best matches. Tuning — if the song sits more than about 8 cents away from A = 440 Hz, we show the offset. BPM — detected in the same pass, so it works as a key and BPM finder in one drop.
The bar chart beside the result is the song’s pitch-class profile: how much of each of the 12 notes the music uses. The highlighted bar is the detected tonic.
How the key finder detects a key
Every key has a fingerprint. In C major, C, E and G appear most, F and B less, and C♯ hardly at all. Music psychologists measured these fingerprints decades ago — the Krumhansl-Kessler and Temperley key profiles — and they still underpin many music key finders today.
The key finder decodes your song in the browser and picks out the strongest pitches in hundreds of short slices. Each pitch is folded into one of 12 pitch classes (C, C♯, D … B), ignoring octave, which gives a 12-value chroma summary of the whole track. Before folding, it estimates the global tuning, so a song recorded slightly sharp or flat doesn’t smear between neighboring notes.
Then it compares that chroma with all 24 major and minor profiles and scores every match. The best score wins, and the gap to the runner-up sets the confidence. A song that sits firmly in one key fills the meter; one that moves between two keys shows both in the shortlist.
A key detector built for harmonic mixing
Every result includes the Camelot code, the DJ-friendly name for a key: a number from 1 to 12 plus A for minor or B for major. A minor is 8A, C major is 8B, F♯ minor is 11A. Keys that share a number, or sit one number apart, have almost all their notes in common, so tracks in those keys blend without clashing.
That gives you three safe moves from any track: stay on the same code, step one number up or down (8A → 9A or 7A), or switch the letter (8A → 8B). The Camelot wheel lays out all 24 keys with their Open Key codes and relative keys — click any key to see what mixes with it.
How accurate is a key finder?
A key finder is very good at some music and honestly unsure about other music. Here is what to expect.
| Music | What to expect | What to do |
|---|---|---|
| Songs that stay in one key (most pop, EDM, hip-hop) | Usually right; confidence reads high | Use the result; check by ear if it really matters |
| Relative major vs. minor | The most common disagreement — both keys use the same seven notes | Listen for the chord the chorus resolves to |
| Songs that change key | Reports the key that dominates the song | Trim the section you need and analyze it on its own |
| Modal, jazz or atonal music | Lower confidence and a shortlist of close keys | Treat the top three as candidates |
| Drum loops and percussion | No real key to find, so confidence stays low | Analyze a melodic part instead |
| Detuned or heavily distorted audio | Can land a fifth or a semitone away | Check the tuning offset |
This describes how pitch-profile key detection behaves in general. Your ears are the final judge.
Major or relative minor? Why a key finder hesitates
C major and A minor use exactly the same seven notes. The only difference is which note feels like home. That makes relative keys the most common disagreement between key finders — and between musicians.
When the confidence meter is low, look at Also likely. If the relative key is listed, listen to the last chord of the chorus or the bass note the song rests on: if it lands on A, it’s A minor; on C, it’s C major. For DJing it matters less than it seems, because 8A and 8B share a number and mix together either way.
Pitchy vocals and heavy effects can blur a reading. For a song you have the rights to, analyzing the instrumental from the vocal remover often gives a cleaner result.
Who uses a song key finder
DJs build harmonic sets from Camelot codes. Singers check whether a song suits their range before transposing. Producers sample, remix and write toplines in key. Songwriters ask “what key is this song in?” before writing chords over a beat.
Because it reads harmony and tempo together, it doubles as a simple song analyzer. For half-time and double-time readings, the BPM Finder analyzes the same file (1 credit); for a song you can only hear, tap the tempo.
Key and BPM found? Hear your track mastered before you pay.
Get three AI masters — Warm, Balanced and Bright — compared with your mix at matched loudness. Listen to the whole song first; downloading the WAVs costs 10 credits.
How do I find the key of a song?
Drop the song into the key finder at the top of this page. It analyzes the notes in your browser and shows its key, Camelot and Open Key codes, relative key and BPM in a few seconds. Nothing is uploaded; each new song uses 1 credit.
How much does the Key Finder cost?
1 credit per song — about $0.15 or less at the trial-pack rate. Re-checking the same file within 30 days costs nothing extra. You need to sign in; a $2.99 trial pack holds 20 credits, and pack credits last 12 months.
Does the Key Finder upload my songs?
No. It works as a key finder online, but your browser decodes and analyzes the file on your own device; the audio never reaches our servers. You still sign in to run it, because each new song uses credits or your plan’s allowance.
Can it find the key and BPM at the same time?
Yes. Every key analysis also detects the tempo, so one drop gives you key and BPM for 1 credit. If the BPM looks half or double, the BPM Finder shows ½ and 2× readings.
What does the tuning offset mean?
It means the song is tuned away from standard A = 440 Hz — vintage tape that ran fast, a band tuning by ear, or A = 432 Hz, which reads around −32 cents. We show the offset when it is more than about 8 cents. Near ±50 cents a song sits between two keys, so the result may be a semitone off.
Which files work — and can I use a YouTube or Spotify link?
WAV, FLAC, MP3 and M4A up to 200 MB and 10 minutes. Links don’t work: this audio key finder only analyzes files on your device, which keeps it private and legal.
Run your next track through the key finder.
Key, Camelot code, relative key and BPM in one pass — 1 credit per song, and the file never leaves your computer.
Drop a file to start
WAV, FLAC or MP3 · up to 200 MB · 10 min