A song sits just out of your vocal range, or a sample is a semitone off from the track you are building around it. You do not want to slow it down or speed it up, you just want to move the key. That is pitch shifting, and the pitch shifter does it in your browser while leaving the speed untouched.
The short version: load the file, slide the pitch up or down in semitones, and export. The length never changes.
How do I change the key of a song?
Add your file and move the pitch slider. Each step is one semitone, the smallest musical interval. Positive values raise the key, negative ones lower it, and the timing stays put the whole time.
- Add a file. Drop in an MP3, WAV, OGG or M4A.
- Set the pitch. Slide up or down in semitones. Twelve is a full octave.
- Export. Preview the new pitch, then save it as MP3 or WAV.
How much should I shift?
It depends on the job, and small is usually the answer.
- To sing along: one to three semitones is often all it takes to bring a song into your range. Try a couple of values and pick the one that sits comfortably.
- To match two tracks: if a sample clashes with your song, nudge it a semitone or two until they agree.
- For effects: larger shifts, a fifth or a full octave, turn a voice into something deeper or higher for character work and sound design.
Pitch without changing speed
The reason this is its own tool is that it separates pitch from tempo. Old-school pitch changes worked like a record player: speed it up and it also rises in pitch. Here the duration is held fixed, so a vocal you raise by two semitones still ends at exactly the same moment, and still lines up bar for bar with everything else in your project.
If what you actually want is the tape effect, where faster also means higher, the speed changer does that instead.
A note on quality
Moderate shifts of a few semitones sound clean. Very large shifts, near the full octave limit, stretch the audio further and can sound less natural, which is normal for any pitch tool. If a big move sounds odd, a smaller one often gets you what you need. Export to WAV to stay lossless, or MP3 for a smaller file at high quality.
Why it stays on your device
Everything happens on your own machine. The file is read locally, shifted in the browser, and saved back to your computer, with nothing uploaded. There is no size cap from us, no watermark, and no account, so a full song processes as easily as a short loop.
When the key sounds right, open the pitch shifter and export. To even out the loudness of the result before you use it, run it through change volume and normalize.