Is this pitch changer free?

Yes. Changing the pitch, the key, the tuning and the speed, the live preview and every download are free, with no account.

How do I change the key of a song?

Drop the song in and read its key, then pick the new key from the list: “Nearest” takes the shorter way, “Up” and “Down” always go that way. The number under each key is the semitones it takes. Press “Make the file” to download it in the new key.

Does changing the pitch change the speed?

The pitch changer keeps the tempo and the length exactly as they were, to the sample. If you also want it faster or slower, set the speed in the same studio, or use the audio speed changer.

How do I change the pitch of my voice without sounding like a chipmunk?

In this voice pitch changer, leave “Keep the voice” on. It moves the pitch and leaves the voice’s own resonances where they were, so a higher or lower voice still sounds like the same person. It is on by default for speech.

What is the difference between semitones and cents?

A semitone is one step between neighbouring notes, and twelve make an octave. A cent is a hundredth of a semitone, for fine tuning. The pitch changer goes up to 24 semitones either way and 100 cents either way.

How do I convert a song to 432 Hz?

Drop it in: the tuning card shows where its A sits against 440 Hz. Click “To A = 432 Hz” and the exact correction is set, usually about −32 cents. The tempo doesn’t change.

Can I change the pitch of a video?

Yes. Drop in an MP4, MOV or WebM and move only the pitch: the video comes back with its picture copied as it is and the new sound, when your browser can write the video’s sound (AAC for MP4 and MOV, Opus for WebM and MKV). Otherwise, and when the speed changes too, you get the sound as MP3 or WAV; the studio says which before you make the file.

How accurate is the pitch shifter?

On test tones from −24 to +24 semitones the result lands within one cent of the target pitch, and the file is exactly as long as the original. A cent is well below what the ear can tell apart.

Can I hear the result before downloading?

Yes. Press “Play” and change any setting while it plays: you hear it at once through the same engine that writes the file. Switch to “Original” to compare at the same moment, or pick a part and loop it.

Which formats can I use?

Any audio or video your browser can play: MP3, WAV, FLAC, M4A, AAC, OGG, Opus, WebM, and the sound of MP4, MOV and MKV videos. The result is MP3 at 128 to 320 kbps, 16- or 24-bit WAV, or the video itself when only the pitch changes.

How long can a file be?

The live preview plays files up to about 25 minutes of stereo sound on a computer and about 12 minutes on a phone. Longer files are changed in full; download them to listen.

Your file stays in your browser: the pitch changer reads, changes and writes it there, and the download comes from there.

Pitch Changer: Change Song Key or Pitch

no sign-up, nothing to install: Free
and ±100 cents to fine-tune: ±24 semitones
on test tones, length kept exactly: Within 1 cent
pick it, the semitones are worked out: Any key
or 440, from the tuning it measures: 432 Hz
higher or lower, still the same person: Voice kept

How do I change the pitch of a song?

Open the pitch changer in the studio and drop in the song. It reads the key, so you can pick the key you want from the list, or move the pitch by semitones (twelve make an octave) and fine-tune in cents. The tempo stays the same. Press “Play” to hear it as you change it, switch to “Original” to compare, then press “Make the file” and download MP3 or WAV.

Change the pitch of audio in three steps

On a phone or a computer, with any audio or video file your browser can play.

Drop in a song, a voice or a video
MP3, WAV, FLAC, M4A, OGG or the sound of an MP4 or MOV. The key, tempo and tuning are read straight away.
Pick a key or move by semitones
Choose the new key, or drag semitones and cents. It plays as you change it; switch to “Original” or loop a part to compare.
Make the file and download
MP3 up to 320 kbps or 16- or 24-bit WAV, named after its new key or the semitones. A video keeps its picture.

A pitch shifter that knows the key

Change song key by name, retune a song, or move a voice higher or lower with the pitch changer, the tempo and the length kept exactly.

Three glasses of water at different levels at blue hour

Change song key by name

The pitch changer reads the song’s key (with how sure it is, the runner-up and its Camelot code) and lists all twelve keys with the semitones to each. Pick the nearest way, or always up or down, and the result shows the key it lands in.

A voice pitch changer that keeps the voice

“Keep the voice” moves the pitch and leaves the voice’s own character where it was, so a higher voice still sounds like the same person. Turn it off for a playful chipmunk or giant voice. The voice pitch changer turns it on by default when the file is speech.

Retune to 432 Hz or back to 440

The pitch changer measures the tuning of the recording against A = 440 Hz. One click retunes it to A = 432 Hz, or corrects a recording that sits a little sharp or flat back to 440, without touching the tempo.

Hear it as you change it

Every setting plays at once through the same engine that writes the file, so what you hear is what you download. Switch between “Original” and “Changed” at the same moment, and loop a part while you set it.

Accurate to a cent, the same length

Measured on test tones from −24 to +24 semitones, the pitch shifter lands within one cent of the target, and the file is exactly as long as the original, to the sample. The beat stays where it was.

Change the pitch of a video

Drop in an MP4, MOV or WebM and move only the pitch: the pitch changer copies the picture as it is and writes only the sound again, so the video comes back in its new key with nothing else changed (where your browser can write the video’s sound).

MP3 or WAV at the quality you choose

MP3 at 128 to 320 kbps to share, WAV at 16 or 24 bits to keep editing. If the new pitch would clip, the pitch changer lowers the whole file just enough to stay clean.

Pitch changer samples: before and after

Each sound was changed by this pitch changer from the site’s own AI songs and voices. Every card shows the settings and what the studio read, and opens in the studio with them.

Pitch changer guide: keys, semitones and voices

What a pitch changer does

A pitch changer moves every note of a recording up or down by the same interval and leaves its timing alone: the song keeps its tempo and length, the singer still sings the same words at the same moments, only higher or lower.

Playing a record faster raises its pitch and its speed together. To change one without the other, the sound is first stretched in time without changing its pitch, then resampled so its length comes back and every frequency moves by the chosen ratio. The tempo is untouched; the pitch has moved.

How to change song key for your voice

Singers change the key of a song so its highest and lowest notes sit where their voice is comfortable. Moving down two or three semitones is common for a song written for a higher voice; moving up suits a song that sits too low.

1Drop the song into the pitch changer and read its key.
2Loop the highest line of the song and sing along with it.
3Move down (or up) one semitone at a time until that line feels easy, or pick the key from the list.
4Check the lowest line too, then make the file and sing along in the new key.

Choose “Nearest” to keep the change small: every key is at most six semitones away that way, and smaller steps sound more natural.

Semitones, cents and keys

A semitone is the step between two neighbouring notes; twelve make an octave, so +12 is the same song an octave up. Each semitone is divided into 100 cents, small enough to correct tuning by ear. Moving a song by one semitone moves its key one step: C major becomes D♭ major, and its Camelot code moves seven places round the wheel.

Big shifts change the character of a sound more than small ones. Two or three semitones are hard to notice on most music; an octave is clearly a different sound. The pitch changer goes to 24 semitones either way, for special effects as well as new keys.

Keep the voice: how a voice pitch changer stays natural

A voice has two parts: the pitch of the vocal cords, and the resonances of the throat and mouth that shape every vowel (the formants). Shift both together and a voice sounds smaller or bigger, the familiar chipmunk or giant effect.

With “Keep the voice” on, the pitch changer measures the shape of the sound’s spectrum in every frame and puts it back where it was after the pitch moves, so the voice sings or speaks higher or lower and still sounds like the same person. It is on by default when the file is speech; turn it off when you want the playful effect.

432 Hz tuning

Most music today is tuned so the A above middle C is 440 Hz. Tuning to 432 Hz lowers every note by about 31.8 cents, a third of a semitone, a sound some listeners prefer as slightly warmer and softer.

Recordings are not always exactly at 440. The pitch changer measures where the song’s notes sit and works out the exact correction, so a song tuned a little sharp lands on 432 Hz, or on 440 Hz if you only want it back in tune with other music.

How the pitch shifter works, and how accurate it is

The pitch shifter is a phase vocoder written for this site: the sound is cut into overlapping 93 ms frames, each frame’s partials are moved in step so chords stay whole, and drum hits are passed through as they are so they stay sharp. Speech is stretched in the time domain, or with a shorter window when the voice is kept, so consonants stay crisp. The result is resampled to its exact original length.

On test tones from −24 to +24 semitones the pitch lands within one cent of the target, and every file comes out the same length as the original to the sample.