Drop in a song to detect its key, plus the Camelot code and BPM. It all runs on your device, with no upload.
or drop it here
MP3, WAV, M4A, OGG, FLAC or any format your browser can decode; up to the first 10 minutes · Maximum 100 MBYour file is processed in your browser and never uploaded
Pick an audio file or drag it onto the box above.
The file is decoded and read locally, never uploaded.
See key, Camelot code, relative key and BPM, then copy.
A song key is the note the music keeps coming home to, plus whether it sounds major or minor. The key finder names both, such as A minor, with a confidence score.
Each key also gets a Camelot code, like 8A for A minor. Codes that match, sit one number apart or share a number with the other letter usually mix cleanly.
This audio key finder decodes and analyzes music inside your browser with signal processing, not AI. Your files never leave the device and there is no account to make.
Knowing the key of a song saves guesswork when music has to fit with other music. Six common cases.
Check Camelot codes before a set so neighboring tracks share a key or sit one step apart, and long blends stay free of clashing notes.
Find the original key, then move it up or down with the pitch changer until the chorus sits comfortably for practice or karaoke.
Knowing the key narrows down the chords before you start. In G major, expect G, C, D and E minor to do most of the work.
Pick acapellas and instrumentals that share a key, or note how far apart they are so you know how many semitones to shift.
When two music cues meet in a video, matching or neighboring keys make the cut between them sound planned instead of jarring.
Play students a song, show the detected key and its relative major or minor, and talk through why the two share the same notes.
All three can find the key. The difference is what you need on hand and how much of the work you do yourself.
| Compare | This key finder | By ear or instrument | Desktop DJ software |
|---|---|---|---|
| What you need | A browser and a file, no sign-up | A trained ear or an instrument | An installed app on a computer |
| Where audio goes | Analyzed on your device, never uploaded | Nowhere, you just listen | Stays in your local library |
| What you get | Key, Camelot code, relative key, BPM | Your best judgment of the home note | A key for each analyzed track |
| Skill needed | None, just read the result | Practice and some music theory | Setup and some learning |
| Songs that change key | One overall key per file | You can follow each change | Depends on the program |
| Best for | Quick checks before a set or practice | Learning songs and training your ear | Analyzing a large DJ library |
Most wrong readings come from the audio, not the math. Check these six things when a result looks off.
A full-quality file beats a phone recording of speakers. Room noise and crowd sound blur the notes the analysis relies on.
Long drum intros, spoken parts and silence carry no harmony. If you can, trim them off and analyze the main body of the song.
A DJ mix or medley holds several keys and gets one blended answer. Split it into single tracks; only the first 10 minutes are read.
A minor and C major share the same notes. If the result feels wrong, listen for which chord sounds like home: the dark or the bright one.
When confidence is low, look at the next two keys. The answer is often one of them, commonly a key a fifth away or the relative key.
Hum or play the suggested home note over the track. If it sounds settled at the end of a phrase, the reading is probably right.
Answers about keys, Camelot codes and how this key finder works.
Drop the song into the key finder above and it reports the key and mode, such as D major, with a Camelot code and a confidence score. Without a tool, find the note that feels like home at the end of phrases, then decide whether the music sounds major or minor.
Hum the note the melody keeps returning to and find it on a piano or guitar; that is the tonic. Then play its major and minor chords over the tune and keep the one that fits. The last chord of a song is often, though not always, the home chord.
No. It is an automatic key detector built on signal processing, not AI. It measures how strongly each of the 12 notes is present across the track, compares that profile with all 24 major and minor keys, and ranks the closest matches.
The Camelot wheel numbers the keys from 1 to 12 and adds A for minor or B for major, so 8A is A minor and 8B is C major. Codes with the same number are relative keys. DJs mix tracks with the same code, one number up or down, or the same number and the other letter.
A minor and C major are relative keys built from the same seven notes, so the line between them is thin, which is why the relative key is shown next to the result. Decide by ear which chord feels like home; for DJ mixing, 8A and 8B blend either way.
It gives one overall key per file, so a song that modulates shows the key that dominates it as a whole. To check a later section, cut it into its own file and analyze that. The next two likely keys can also hint at the second key.
Yes. You can analyze an a cappella or a recording of yourself singing. A single voice carries fewer notes than a full band, so treat the result as a starting point and check the runner-up keys. To fit a song to your range, shift it with the pitch changer.
It is free with no sign-up. Files are decoded and analyzed in your browser and never uploaded. It reads what your browser can play, usually MP3, WAV, M4A, AAC, OGG and FLAC, in desktop or mobile browsers, and checks up to the first 10 minutes of a file.
Drop an audio file into the tool above. It is free, needs no account and never leaves your device.
