Change the pitch.
Change the tempo. Independently.
Shift a track up or down in semitones, or speed it up and slow it down — without the chipmunk effect. Runs entirely in your browser: free, no signup, no upload, no limit on how long you experiment.
Try it now — pick a file, drag the sliders
Free, no signup, no upload. Runs entirely in your browser using the same soundtouchjs engine as the full app.
Your file is processed locally — never uploaded, never stored.
- Independent pitch and tempo control — speed up a track without raising its pitch, or drop the key without slowing it down
- Semitone-accurate pitch shifting (±6 semitones), powered by the same soundtouchjs engine as the full app
- Runs 100% in your browser via the Web Audio API — your file is never uploaded anywhere
- No account, no watermark, and no limit on how many tracks you try in this demo
Pick a track
Choose any audio file from your device — nothing is uploaded.
Adjust pitch and tempo
Drag the sliders independently, with a real-time preview as you go.
Sign up to apply it to your library (optional)
Create a free account to use the same engine on tracks you've already uploaded.
Is this really free?
Yes — this demo runs entirely in your browser using the same audio engine as the signed-in app. There's no signup, no upload, and no limit on how many tracks you try.
Does my file get uploaded anywhere?
No. Everything happens locally in your browser via the Web Audio API — your file never leaves your device.
What's the difference between pitch and tempo here?
Tempo changes playback speed independently of key; pitch shifts the key in semitones independently of speed. Adjust either one without affecting the other — unlike a turntable's pitch fader, which couples the two.
Can I export or download the result?
Not from this demo — it's preview-only. Sign up free and add the track to your library to unlock export from the full Pitcher tab.
Why would I need this as a DJ?
Match a track's key to the rest of your set without slowing it down, or push the energy up with a faster tempo without a pitched-up vocal.