Change the key of any song online: open an MP3, WAV or video file, see its original key and tempo, then pick a new key or shift it by up to 12 semitones up or down. The tempo stays the same, you can compare both versions, and you download the result as MP3 or WAV. Nothing is uploaded.
Song Key Changer
Change the key of your song: open it, see its key, pick a new one. The tempo stays the same.
Start with Step 1: choose a song from your device.
Original key
- Tempo
- –
- Length
- –
- File
- –
Open a song to listen to it here.
The waveform of your song appears here
To repeat one part, drag across the waveform, or use the loop buttons while it plays.
Step 2 Pick the new key
Same key as the song Shift: 0 semitones. Tap a key below or use −1 / +1.
The number on each key is the shift in semitones. The key with the cyan bar is the original key.
Nearest takes the smallest shift. Up or Down always goes higher or lower.
Tempo: unchanged. Only the key changes.
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Related tools
How to change the key of a song
- Open the song. Tap Choose a song or drop a file on the tool: MP3, WAV, M4A, OGG, FLAC, or an MP4, MOV or WebM video (up to 10 minutes). No file at hand? Press Try a demo song.
- Check the original key. The tool names the key, the detection confidence, the relative key and the tempo in BPM. If the key is wrong, choose the right one under Wrong key?
- Pick the new key. Tap it on the keyboard, or press −1 and +1 to move one semitone at a time. Direction decides whether a tapped key goes up, down or the nearest way.
- Listen and compare. Press Play and switch between Original and New key. Drag across the waveform to loop the chorus.
- Download the song. Choose MP3 (192 kbps) or WAV (16-bit) and press Download. The file name carries the new key, for example
song_F-major_-2st.mp3.
Example: a song in G major is too high for you. Tap F: the shift is −2 semitones (down a whole step), the song plays in F major, and a 3:20 song still lasts 3:20.
How key changing works
A key change moves every note of the song by the same number of semitones. A semitone is the smallest step in Western music: one piano key or one guitar fret. Each semitone multiplies the frequency by 21/12 ≈ 1.0595, so one step up is about 5.95 % higher. Twelve semitones make an octave, which doubles the frequency, and 100 cents make one semitone (see what semitones are).
Example: the note A4 at 440 Hz becomes 493.88 Hz (B4) after +2 semitones and 329.63 Hz (E4) after −5 semitones.
Why the tempo stays the same: speeding up a recording raises the pitch and the tempo together (+1 semitone = 5.95 % faster). This tool separates them. It stretches the audio in time with a phase vocoder and then resamples it, so the pitch moves while the length and the BPM stay exactly as they were. That difference is explained in key change vs pitch change.
Formants: a voice also has resonances, called formants, that shape its sound. A pitch shift moves them with the notes, so big shifts make a voice sound thinner (up) or darker (down). Shifts of up to about 3 semitones usually sound natural.
Key change chart: which key after a shift?
Find the song’s key in the first column. The other columns show the key after moving it down or up by 1–3 semitones. Minor keys move the same way: A minor −2 is G minor. For all keys with their notes, see the music key chart.
| Original key | −3 | −2 | −1 | +1 | +2 | +3 |
|---|---|---|---|---|---|---|
| C major | A | B♭ | B | D♭ | D | E♭ |
| D♭ major | B♭ | B | C | D | E♭ | E |
| D major | B | C | D♭ | E♭ | E | F |
| E♭ major | C | D♭ | D | E | F | F♯ |
| E major | D♭ | D | E♭ | F | F♯ | G |
| F major | D | E♭ | E | F♯ | G | A♭ |
| F♯ major | E♭ | E | F | G | A♭ | A |
| G major | E | F | F♯ | A♭ | A | B♭ |
| A♭ major | F | F♯ | G | A | B♭ | B |
| A major | F♯ | G | A♭ | B♭ | B | C |
| B♭ major | G | A♭ | A | B | C | D♭ |
| B major | A♭ | A | B♭ | C | D♭ | D |
The next table turns semitones into numbers: the frequency ratio, where A4 (440 Hz) lands, and how much faster or slower a song would play if pitch and speed moved together, as on a record player. This tool keeps the speed at 100 %.
| Semitones | Interval | Frequency ratio | A4 440 Hz becomes | Speed if pitch and tempo moved together |
|---|---|---|---|---|
| −12 | octave | ×0.5000 | 220.00 Hz | -50.0 % |
| −7 | perfect fifth | ×0.6674 | 293.66 Hz | -33.3 % |
| −5 | perfect fourth | ×0.7492 | 329.63 Hz | -25.1 % |
| −3 | minor third | ×0.8409 | 369.99 Hz | -15.9 % |
| −2 | whole step | ×0.8909 | 392.00 Hz | -10.9 % |
| −1 | half step | ×0.9439 | 415.30 Hz | -5.6 % |
| +1 | half step | ×1.0595 | 466.16 Hz | +5.9 % |
| +2 | whole step | ×1.1225 | 493.88 Hz | +12.2 % |
| +3 | minor third | ×1.1892 | 523.25 Hz | +18.9 % |
| +5 | perfect fourth | ×1.3348 | 587.33 Hz | +33.5 % |
| +7 | perfect fifth | ×1.4983 | 659.26 Hz | +49.8 % |
| +12 | octave | ×2.0000 | 880.00 Hz | +100.0 % |
Who uses a key changer?
Singers move a song that sits too high or too low: 1–3 semitones down is often enough when the top notes strain the voice (see song too high for your voice). Find your range first with the vocal range test. Songs written for another voice type often need a bigger shift; the male to female key change guide explains how to choose it.
Guitarists use it instead of a capo or retuning. A capo raises the key by 1 semitone per fret; a recording in E♭ can be moved +1 to E to play along with open E shapes.
Karaoke singers make a backing track in their own key; the karaoke pitch changer has more tips. Bands and choirs make rehearsal tracks in the key they perform in. Students and teachers hear how the same song sounds in related keys, for example one step around the circle of fifths.
Sound quality and limits
- Pitch accuracy: in our tests every downloaded file landed within 0.1 cents of the exact target (1 cent = 1/100 semitone).
- Length and tempo: identical to the original, to the sample. A song in E♭ major at 100 BPM, shifted −3, was analysed afterwards as C major at 100 BPM.
- Loudness: the level is lowered only if the new key would clip. WAV files stay below −0.1 dBFS and MP3 files below −1 dBFS.
- Speed: for a 3-minute song the new key starts playing from a preview in under a second, and the whole song is ready in about 4 seconds on a desktop computer. Phones take longer.
- Files: up to 10 minutes and 200 MB. Videos give an audio file (MP3 or WAV), not a new video.
- Key detection: relative keys share the same notes (C major and A minor), and some songs change key or are mostly drums. If the name looks wrong, set it yourself: the semitone shift is correct either way.
Key changer, pitch shifter or pitch and tempo changer?
| Tool | Use it when | Tempo |
|---|---|---|
| Song key changer (this page) | You think in keys (G → F) and want the key found for you | Stays the same |
| Pitch shifter | You want free semitone and cent shifts for any sound | Stays the same |
| Pitch and tempo changer | You also want the song faster or slower | Changed separately |
| BPM pitch changer | You need a key and a target BPM together | Set in BPM |
| Online pitch changer | You want a quick pitch change of any audio | Stays the same |
Questions about changing the key of a song
How do I change the key of a song without changing the tempo?
Open the song in the key changer above, pick the new key and download it. The tool moves the pitch with a phase vocoder and keeps the length, so a 3:20 song still lasts 3:20 and the beat keeps its BPM.
How many semitones do I need to change the key?
Count the steps from the old key to the new one: G to F is −2, C to E♭ is +3. The keyboard in the tool counts for you, and the guide on how many semitones to change key has a full table.
How do I lower the key of a song?
Tap a lower key or press −1 once per semitone. For a song that is a little too high, −1 to −3 semitones is usually enough. Set Direction to Down so a tapped key is always below the original.
Is the key changer free, and is my song uploaded?
It is free, with no sign-up, and your song is never uploaded. Your browser does all the work on your own device. A shared link contains only the settings, such as −2 semitones, never the audio.
Can I change the key of a video or a YouTube song?
You can open MP4, MOV and WebM files: the tool changes the key of their sound and saves it as MP3 or WAV, not as a video. For songs you play on YouTube, see the YouTube pitch changer.
What if the detected key is wrong?
Choose the right key under Wrong key? Only the key names change; the shift in semitones stays correct. Common reasons are relative keys (C major and A minor share their notes), a key change inside the song, or a track that is mostly drums.
Is a key converter the same as a key changer?
Usually yes: both move a song to another key by semitones. Turning a major song into minor is different, because it changes the mode and not just the pitch. For that, use the Major to Minor Converter listed above.
Tested: what we measured
- 21 downloaded files re-measured: pitch within 0.1 cents of the target (for example 440 Hz +2 semitones → 493.88 Hz), length identical to the sample.
- Chords stay in tune: all four notes of a C major chord moved to F major within 0.1 cent.
- Key detection: 24 of 24 test songs in all major and minor keys, plus three real recordings (Bach, Beethoven, Pachelbel).
- Formats opened: MP3 (CBR and VBR), WAV (16- and 24-bit), FLAC, OGG, M4A and the sound of MP4 and WebM videos.
Last updated 27 September 2026 by Mayer. How we test: how it works.