Free · in your browser · ±12 semitones · speed independent

Pitch Changer

Move a song up or down in semitones and keep the tempo exactly where it was. This audio pitch changer detects the key, shows you where the shift lands, lets you change speed on its own, and exports a WAV — all without uploading anything.

Drop audio here

or click to choose a file

MP3, WAV, FLAC, AIFF, OGG, M4A · suggested under 25 MB

100% in-browser±12 semitonesSpeed on its ownShows the key

What a pitch changer does (and what it can't)

A pitch changer moves every note in a recording higher or lower by a fixed musical interval, measured in semitones — the distance between two adjacent piano keys. Shift by +2 and a song in C major is now in D major; shift by -12 and everything drops a full octave. The point is that the tempo stays put: a three-minute track is still three minutes long after the shift, which is what separates a real song pitch changer from simply playing the file faster or slower.

That separation takes two steps. The audio is first stretched in time with an overlap-add algorithm (WSOLA) that re-aligns small overlapping grains so sustained notes do not phase against themselves, then resampled so the pitch lands on the new key. Speed is the same process run without the resampling step, which is why this tool can change one without the other, or both at once.

What it cannot do is make the result sound recorded in the new key. Beyond about four or five semitones, vocals start to sound artificially small or large because the singer's formants move with the pitch, and dense mixes pick up a slight granular texture. For transposing a backing track a few steps to fit a vocal range, slowing a solo down to learn it, or matching keys between two tracks, that is not a problem; for an octave shift on a lead vocal, it is audible.

Pitch changer features

Shift by semitones, ±12

One step per semitone, up to an octave in either direction, with quick buttons for the ±1 and ±2 shifts that cover most vocal-range fixes.

Speed stays where it was

Changing pitch does not touch tempo. A separate speed slider (50–150%) changes tempo without touching pitch, so you can slow a passage down to practise without it dropping in key.

See the key move

The original key is detected from the audio and the target key is shown next to it as you drag the slider: A Minor → C Minor, not just "+3".

Everything in your browser

Decoding, key detection, the pitch shift and the WAV export all run locally with the Web Audio API and a background worker. The file never leaves your device.

Hear it before you save

Play the shifted result from the page, adjust, play again. Download only when it sounds right.

Free, no account

No sign-up, no queue, no watermark, no upload limit beyond what your browser's memory can decode.

Who changes the pitch of a song

Singers fitting a backing track

The original is a step too high for your voice. Drop it one or two semitones, check the new key, and sing the version that fits.

Musicians learning by ear

Slow a solo to 75% at the original pitch to hear every note, then bring the speed back up as it lands under your fingers.

DJs and producers matching keys

Nudge a track a semitone so it sits in the same or a compatible key as the one you are mixing into.

Karaoke and covers

Transpose any song to the key you are comfortable in before a performance, without changing how fast it goes.

How to change the pitch of a song

1. Drop the audio file
MP3, WAV, FLAC, AIFF, OGG or M4A. It is decoded in your browser and the key is detected automatically.
2. Set the pitch and speed
Drag the pitch slider in semitones and watch the target key update. Change the speed separately if you want, then press play to hear the result.
3. Download the WAV
When it sounds right, export a 16-bit WAV with the shift and speed in the filename.

Pitch changer FAQ

Does changing the pitch change the speed?

No. The pitch slider only changes the key; the length and tempo of the track stay the same. The speed slider is separate and only changes tempo. Move both if you want the old-fashioned tape effect where pitch and speed change together.

How do I change the key of a song?

Drop the file, read the detected key, then move the pitch slider until the target key shows the one you want. Each semitone is one step on the slider; C to D is +2, C to A is -3 (or +9).

Is this pitch changer free?

Yes, and it stays free because there is nothing to pay for on our side: the whole job runs on your own device. No account, no credits, no watermark.

Can I change pitch without losing quality?

Small shifts of one to three semitones are hard to tell from the original. Larger shifts are still clean enough for practice and karaoke, but vocals start to sound unnaturally thin or thick beyond four or five semitones because the singer's formants move with the pitch, and dense mixes gain a slight granular texture. The export itself is lossless 16-bit WAV, so nothing is lost after the shift.

How many semitones can I shift?

Up to 12 in either direction — a full octave. Twelve semitones up doubles every frequency; twelve down halves it.

Can I change the speed without changing the pitch?

Yes. Leave the pitch slider at 0 and move the speed slider between 50% and 150%. The key stays the same while the tempo changes, which is what you want for slowing a passage down to learn it.

Is my file uploaded anywhere?

No. Decoding, key detection, pitch shifting and the WAV export all happen in your browser. Close the tab and nothing remains.

What formats are supported?

Anything your browser can decode: MP3, WAV, FLAC, AIFF, OGG and M4A in practice. Output is WAV. Very large files depend on your device's memory; under 25 MB is comfortable on a phone.