Key Finder — Find the Key of Any Song Online Free
Key detector

Song Key Finder

Find out what key a song is in. Upload a track and get its key, scale, relative key and Camelot code instantly.

100% free No signup Runs in your browser

Analyzing tempo and key…

Your file never leaves your device. Analysis runs in your browser.

Key
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· Camelot
Confidence:
Relative key
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Camelot
Mixes well with:

Play the track and tap along to double-check the tempo by ear.

AnyToSpeech AI Music Studio
AnyToSpeech

Create a new song in this key

Generate an original instrumental in the same key and use it for a mashup, cover or practice track.

  • Full songs from a text idea, your own lyrics, or instrumental beds.
  • Two versions every generate so you can pick the better take.
  • Try one free — no account needed. Sign in to keep creating.
Generate my beat

How it works

Upload your song

Choose an MP3, WAV, M4A or FLAC file — analysis happens on your device.

Detect the key

We measure how much of each of the 12 notes appears and match it against every major and minor key.

Sing, play or mix

Play the tonic chord to confirm, then transpose, harmonize or mix with compatible keys.

What key is this song in?

Singers use the key to choose a comfortable range, guitarists and pianists to play along, producers to sample in tune, and DJs to mix harmonically. This key finder builds a chromagram of the song and compares it with standard key profiles to find the best match.

Alongside the key you get the relative major or minor, the Camelot number and the keys that mix well with it. If the song is too high or low for your voice, use the pitch changer to move it into your range.

More free music tools

Circle of Fifths Interactive wheel with keys, chords and progressions. BPM & Key Finder Detect the tempo, key and Camelot number of any song. Pitch Changer Change the key of a song up or down without changing its speed.
See all music tools

Frequently asked questions

How does the key finder work?

It decodes the audio, measures the energy of each pitch class across the track and compares the result with major and minor key profiles. The closest match is the detected key.

Why do I see a relative key as an alternative?

Relative keys such as C major and A minor share exactly the same notes, so they can be hard to tell apart. Check which chord feels like "home" — that is the real key.

Can it detect key changes?

The tool reports the main key of the analyzed section. Songs that modulate may show a lower confidence and list the other keys it heard.

Is the key finder free?

Yes, it is completely free with no limits, and your audio never leaves your device.