Pitch Changer / Varispeed
Drop in a track and spin the wheel to slow it down, speed it up, or shift the key. Pick a mode: varispeed like tape, change pitch but keep the speed, or change speed but keep the pitch. Then export a WAV, all in your browser.
Drag the wheel, scroll over it, or use ←→. Double‑click to reset.
Varispeed moves pitch + speed together (tape/turntable, the slowed & nightcore sound). Pitch changes the key but keeps the speed. Speed changes the tempo but keeps the pitch (slow down without the chipmunk effect). Pitch & Speed use a time‑stretch engine, so big shifts have mild artifacts; varispeed is artifact‑free.
100% local. Your file is decoded, processed, and exported entirely on your device, nothing is uploaded or used to train anything. The same principle behind Xport Studio.
How to change a song's pitch or speed
- Drop in a track (MP3, WAV, FLAC, M4A, or OGG).
- Pick a mode: Varispeed (pitch and speed together), Pitch (change key, keep speed), or Speed (change tempo, keep pitch).
- Drag the wheel, scroll over it, or tap a preset to set the shift in semitones, up to 24 either way.
- Press Play to audition, then hit Export WAV. The render happens on your device.
Making a slowed or nightcore edit?
We built dedicated tools for both. The Slowed + Reverb Maker pairs the slowdown with a tuned reverb tail, and the Nightcore Maker handles the sped-up side. Reach for those if you want the sound in two clicks. This page is the general-purpose tool: full manual control in semitones, three modes, no preset deciding for you.
When to use each mode
Varispeed is the tape-style option: pitch and tempo move together, and because it is a plain rate change it is the cleanest of the three. Use it for sampling, chopping edits, or roughing out slowed and sped-up versions with zero artifacts.
Pitch transposes the track while the tempo stays fixed. Use it to move a song into a vocalist's range, or to match a sample to your session key without touching the timing.
Speed changes the tempo while the key stays fixed. Slow a solo down to learn it note by note, or nudge a track a few BPM to sit in a set, all without the chipmunk effect.
FAQ
What is varispeed?
Pitch and speed changing together, the way a tape machine or a turntable behaves when you change the playback rate. Slow it down and the key drops, speed it up and the key rises. It is the cleanest mode here because nothing is being stretched, just resampled.
Can I change pitch without changing speed?
Yes. Pitch mode moves the key and leaves the tempo alone. Speed mode is the reverse: change the tempo without the chipmunk effect. Both hold one dimension steady while you turn the wheel.
How many semitones can I shift before it sounds bad?
In Varispeed mode there is no quality limit, it is a plain rate change. In Pitch and Speed modes, 2 or 3 semitones usually pass unnoticed, 4 or 5 starts to smear transients and vocal texture, and past 7 the artifacts are obvious on most material. Dense mixes hide artifacts better than solo vocals or piano.
Can I transpose a song to a different key online?
Yes. Load the song, switch to Pitch mode, and shift by the interval you need: +2 semitones moves C to D, -3 moves C to A. The tempo does not change, so the track still lines up with your session or backing track. For matching a vocalist, moves of 1 to 3 semitones usually sound most natural.
What is the difference between pitch shifting and time stretching?
Pitch shifting changes the note without changing the length. Time stretching changes the length without changing the note. Here, Pitch mode does the first and Speed mode does the second, both on the same engine. Varispeed is neither: it resamples the audio, so pitch and length move together.
Is my file uploaded?
No. Your browser decodes the file, renders the shift on your own CPU, and writes the WAV straight to your downloads folder. The audio never touches a server. Our desktop app, Xport Studio, runs on the same rule: everything stays on your machine.