Pitch Changer — Change the Key and Tempo of Any Song
This pitch changer shifts a song up or down in semitones without changing its tempo, or slows it down without changing the pitch, then saves it as a new file. Free to try.
Need the vocals out first? Make a karaoke track
What Is a Pitch Changer?
A pitch changer is a tool that moves a song up or down in key, measured in semitones, without changing how fast it plays. Stem Splitter AI's pitch changer shifts a song up to 12 semitones either way, changes the speed from 50% to 150% separately without changing the key, detects the original key so you can pick the one you want, and saves the full song as MP3 or WAV in your browser, free.
How do you hear the new key before you save?
Load a song and the pitch changer plays a 20-second stretch from inside it. Move the key or the speed and switch between Changed and Original to hear both from the same spot; the detected key and tempo update to the values you will get.
Listen to the voice: a shift of a few semitones keeps it natural, while a large shift up or down starts to sound thin or heavy. Saving the full song is free and happens in your browser, so try a few settings before you keep one.
What does a pitch changer change, and what does it keep?
Key is measured in semitones: one semitone is the step from one piano key to the next, and twelve make an octave. Most singers need a shift of two to five semitones to bring a song into their range, and the table below lists the usual settings.
Key and speed are separate controls in the pitch changer. Lowering the key keeps the song at its tempo, and slowing it down keeps it in its key. The detected key and tempo are shown with the new values, so you know where you will land: A minor down two semitones reads G minor, 120 BPM at 90% reads 108 BPM.
| Change | Setting | Typical use |
|---|---|---|
| Lower a song for a deeper voice | −2 to −5 semitones | Singing a female-key song in a male range |
| Raise a song | +2 to +5 semitones | Singing a male-key song in a higher range |
| Match a capo or a tuning | −1 semitone | Playing along to a band tuned to E♭ |
| Slow down to learn | 75%–90% speed, key unchanged | Practising a solo or a fast verse |
| A full octave | ±12 semitones | Bass lines, sound design, chipmunk effects |
Why does changing the pitch of a song often sound bad?
The simplest way to change pitch is to play a file faster or slower, like a record at the wrong speed. The key moves, but so does the tempo, and the singer turns into a chipmunk or a monster. A proper pitch changer has to stretch the sound in time and resample it, so key and speed move on their own.
An online pitch changer often uploads your file, processes it on a server, caps the length, and sends back a low-bitrate MP3 with no way to hear the result first. Singers who just want a backing track two steps lower end up downloading the same song five times to find the right key.
Why use this pitch changer?
Pick the key, not just the number
The song’s key is detected, so you can choose "G minor" from a list and the right number of semitones is set for you.
Hear it before you save
The preview updates as you move the controls, with a one-tap switch back to the original.
Speed and key, separately
Slow a song to 75% without changing its key, or drop the key without changing its tempo, or both at once.
Full length, free, private
The whole file is processed in your browser, up to 150 MB, with no upload, sign-up, or watermark.
MP3 or WAV
Save MP3 for a phone or a practice app, or WAV to keep the quality for a recording session.
Why should key and speed be changed independently?
Your range, the song’s groove
A singer usually needs the key to move and the tempo to stay. The pitch changer stretches the audio in short overlapping slices and resamples it, so the beat and the feel stay where the record had them.
A slower song in the same key
Musicians learning a part need the opposite: slower, but still in tune with their instrument. Set only the speed in the pitch changer and the key stays put, so you can play along at 80% and speed up as you learn.
Which files can you open?
The pitch changer opens any song or backing track on your device.
| Input | Details |
|---|---|
| Audio | MP3, WAV, FLAC, AIFF, M4A, AAC, OGG, Opus |
| Video | MP4, MOV, M4V, WebM, MKV; saved as audio |
| File size | Up to 150 MB |
| Key | Up to 12 semitones up or down |
| Speed | 50% to 150% |
| Output | Full-length MP3 or 16-bit WAV, free |
How do you change the pitch of a song?
- 1Open the songDrop in an audio or video file.
- 2Set the keyMove by semitones, or pick the key you want from the list.
- 3Set the speedLeave it at 100%, or slow it down or speed it up.
- 4Save the songDownload the whole track as MP3 or WAV.
Who uses a pitch changer?
Singer with a backing track
Removes the vocal with the karaoke maker, then lowers the backing track three semitones to sit in a comfortable range.
A backing track in their own key, as MP3.
Guitarist practising a solo
Uses the pitch changer to slow the song to 80% with the key unchanged and loops the solo until it is clean, then works up to 100%.
A slower practice version in the original tuning.
Video editor matching music
Uses the pitch changer to raise a royalty-free track one semitone and speed it to 105% so it lines up with the cut and the next clip’s key.
A WAV that fits the edit.
Which tool do you need with the pitch changer?
Change the key last: open the finished song in the pitch changer.
| What you need | Tool | What you get |
|---|---|---|
| A song in another key or speed | Pitch Changer | MP3 or WAV |
| A backing track without the lead singer | Karaoke Maker | Karaoke with harmonies and lyrics |
| The key and tempo of the song | BPM & Key Finder | BPM, key, and Camelot code |
| The song without drums to practise with | Drum Remover | Drumless mix |
| Every instrument apart | Stem Splitter | Six stems |
Is your song uploaded to change its pitch?
No. The song is decoded, processed, and encoded inside your browser. Nothing is sent to a server, and the file is gone from memory when you close the page.
Pitch changer FAQ
Is the pitch changer free?
Yes, including the full-length download. It runs in your browser with no account or watermark, for files up to 150 MB.
Can I change the pitch without changing the speed?
Yes. Key and speed are separate. Move only the key and the song keeps its tempo; move only the speed and it keeps its key.
Why not change the pitch in Audacity or a browser extension?
Audacity's Change Pitch effect works offline, but takes several steps and does not detect the key. Browser extensions shift what is playing on a site rather than give you a file to keep. This pitch changer detects the key, lets you pick the key to move to, previews the change, and saves the full song as MP3 or WAV.
How many semitones should I lower a song?
Most singers need two to four semitones to bring a song into their range. Try a step at a time in the preview, or pick the key you want from the list and the shift is set for you.
Will changing the key reduce the sound quality?
Small shifts of one to four semitones sound natural on most music. Bigger shifts, especially on voices, start to sound processed; that is true of every pitch shifter. Save WAV to avoid adding MP3 compression on top.
Can I change the key of a song and remove the vocals?
Yes. Make the backing track with the karaoke maker first, which also offers a six-semitone key change, then use the pitch changer for a bigger change or a different speed.
Does the pitch changer work on a phone?
Yes, in a current mobile browser. Long songs take longer to save on a phone, so keep the page open until the download starts.
Change the pitch of your song now
Open a song in the pitch changer, pick a new key or speed, and save the full track. Free, and private to your device.
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