# Key finder
Source: https://docs.aden.space/docs/help/free-tools/key-finder

Find any song's key and BPM, read the Camelot wheel, and line songs up into a mashup or a DJ set.
The [Key finder](https://tools.aden.space/key) tells you a song's key and BPM from a file, its name, a link or what it hears. It shows the key on the Camelot wheel, plays its scale and chords, and lines songs up so they mix. Free, no account needed.

<Cards>
  <Card title="Find a song's key and BPM" href="/docs/help/free-tools/key-finder/find-a-songs-key">
    From a file, a song's name, a link or your microphone.
  </Card>

  <Card title="Use the Camelot wheel" href="/docs/help/free-tools/key-finder/use-the-camelot-wheel">
    Relative keys, how far to pitch, and the scale and chords of a key.
  </Card>

  <Card title="Make a mashup" href="/docs/help/free-tools/key-finder/make-a-mashup">
    Fit acapellas to an instrumental and save the mix to Aden.
  </Card>

  <Card title="Put a DJ set in order" href="/docs/help/free-tools/key-finder/order-a-dj-set">
    The order that mixes most smoothly.
  </Card>
</Cards>