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Song Key Finder

Find the musical key of any song for free. Drop in an audio file and see its key (like A minor), the relative major or minor, and the Camelot code for DJ mixing. Nothing is uploaded.

  • No uploads
  • No limits
  • No signup

Drop a song here

MP3, WAV, M4A, OGG, FLAC or a video file. Your audio never leaves this device.

Input:
Song
Output:
Key
Runs on:
Your device
Size limit:
None
Account:
Not needed

How to use Song Key Finder

  1. Add your song

    Drop in an audio file or a video. It is analysed on your device and never uploaded.

  2. Get the key

    The tool listens to up to two minutes from the middle of the track and finds the best-matching major or minor key.

  3. Use it

    Note the relative key and the Camelot code to mix tracks harmonically or pick a scale for a remix.

Why Song Key Finder on Toolshed

  • No uploads

    Everything runs in this browser tab. Your files never leave your device.

  • No limits

    No file-size caps, no daily quotas. Process as much as your device can handle.

  • No signup

    No account, no email, no watermark.

Frequently asked questions

How does the song key finder work?

It measures how much of each of the twelve notes is in the music and compares that with typical major and minor key profiles (the Krumhansl–Schmuckler method). The closest match wins, and the other likely keys are listed too. A song that changes key partway through shows its most common key.

What is the Camelot code?

The Camelot wheel numbers every key from 1 to 12, with A for minor and B for major. Keys with the same number, or a neighbouring number on the same letter, mix well together, which is why DJs use it. A minor and C major share 8.

Are my files uploaded anywhere?

No. Song Key Finder runs entirely in your browser. Your files are processed on your device and are never sent to a server.

Is there a file size limit?

No fixed limit. The only limit is your device's memory. Very large files work best in a desktop browser.

Is Song Key Finder really free?

Yes. There's no account and no watermark. A short optional ad, or a 20-second wait, unlocks each download. That's how we keep it free.

Does it work offline?

Once the page has loaded, processing happens locally, so it keeps working even if your connection drops.