Song Key Changer

Transpose any song or video to the key you need: tap the new key, hear it at the same tempo, then save it as MP3 or WAV.

How many semitones are there between keys?

Every key change is a number of semitones up or down. Count them the way the key tiles do, or look up a common change in the table.

Counting from one key to another

  • The twelve keys repeat in this order: C, C♯/D♭, D, E♭, E, F, F♯, G, A♭, A, B♭, B, then C again. Each step is one semitone.
  • Count up or down to the key you want: G to A is up 2 semitones, and A to G is down 2.
  • Every key can be reached both ways, because up 2 and down 10 land on the same key. The tiles take the shorter way, from five down to six up, so the song changes as little as possible.
  • Six semitones is exactly halfway, so up 6 and down 6 give the same key. The tool goes up.
  • Twelve semitones make an octave: the same key, higher or lower. The − and + buttons go up to 12 semitones either way.
  • The mode stays the same: a song in a major key moves to another major key, and a minor song to another minor key.
Common key changes and how many semitones up or down each one takes
Key changeSemitones
G major → A majorBrighter, for a higher voiceup 2 semitones
C major → D majorup 2 semitones
E major → D majorEasier high notesdown 2 semitones
E♭ major → E majorPlay along in standard guitar tuningup 1 semitone
B♭ major → C majorFrom a horn key to C, easy on pianoup 2 semitones
G major → D majordown 5 semitonesor up 7 semitones
C major → F♯ majorHalfway round, the same either wayup 6 semitonesor down 6 semitones
A minor → E minordown 5 semitonesor up 7 semitones
E minor → D minordown 2 semitones
C♯ minor → A minordown 4 semitones

How to choose the new key

Most key changes are small: one to three semitones fits a song to most voices and instruments. Start from what the new key is for.

  • For your voice

    Sing along with the original. If the highest notes strain, go down a semitone or two; if the lowest notes fade away, go up. A song first sung by a man often sits 3 to 5 semitones too low for a woman, and the other way round.

  • For guitar, piano and other instruments

    Move the song to a key with easier chords or fingerings, such as C, G, D, A or E on guitar, or to the key of your sheet music so the recording and the page agree.

  • For bands, choirs and worship teams

    Make a practice track in the key your singer or choir will perform in, so everyone rehearses with the recording they will actually play to.

  • For karaoke and backing tracks

    Move a backing track or an instrumental to your key, then save it as MP3 for your phone or as WAV for a recording or a show.

How to change the key of a song

Three steps, all on this page.

  1. Open your song

    Choose or drop an MP3, WAV, M4A, FLAC or OGG file, or a video. The original key appears within a few seconds, with the twelve keys around it.

  2. Tap the key you want

    Tap the new key, such as A, and hear the song move there at once, at the same tempo. Use − and + to go further, up to 12 semitones either way.

  3. Save it in the new key

    Pick MP3 or WAV and press Save. The file keeps your song’s name.

Frequently asked questions