Pitch Changer change a song's key or speed
Shift pitch by semitones or transpose straight to a target key, slow a track down, keep vocals natural with formant compensation, and export WAV or MP3. Nothing is uploaded.
Your file is processed in your browser and never uploaded.
How to change a song's key or speed
Three steps, no upload, no account.
Load your audio
Drop in an MP3, WAV, FLAC or other audio file. It's decoded locally — nothing leaves your device.
Adjust pitch & speed
Move the pitch slider up to 12 semitones either way, or pick a target key — the song's current key is detected for you. Leave speed at 100% to keep the tempo, preview instantly, and toggle formant compensation to keep voices natural.
Export WAV or MP3
Render the result in your browser and download a lossless WAV or a compressed MP3.
How many semitones should you change a song's key by?
A semitone is one key on a piano, and 12 make an octave. Negative values lower the key, positive values raise it, and the tempo stays the same.
- The song is a little too high or too low1–2 semitones
- It sits a few notes outside your vocal range3–4 semitones, the most common karaoke fix
- You're moving between a typical male and female vocal rangeUp to 12 semitones (one octave); bigger shifts are easier to hear
- You want to play along on a guitar tuned a half step down−1 semitone
Not sure what key the song is in? Load it and the tool detects the key, so you can pick a target key instead of counting semitones.
Who it's for
One tool for singers, DJs and producers.
DJs
Match keys and tempo for harmonic mixing — transpose a track to a compatible Camelot key without re-ripping.
Producers
Repitch samples, change a loop's key, or slow a stem down while keeping it usable in your DAW.
Singers
Lower or raise a backing track or karaoke file to fit your vocal range. Most singers start 2–3 semitones down when a song sits too high.
Key terms, explained
- Pitch
- How high or low a sound is. Shifting pitch moves every note by the same interval, measured in semitones.
- Semitone
- The smallest step between two adjacent notes (e.g. C to C♯). Twelve semitones make one octave, so C to D is +2 and C to B♭ is −2. You never need more than 6 in either direction to reach any key.
- Formant compensation
- Keeps the natural timbre of a voice when you change pitch, so vocals don't sound like a chipmunk or a monster.
- Slowed + reverb
- A popular edit that slows a song down and adds reverb for a dreamy, spacious feel. Available here as a one-click preset.
Why use this pitch changer
Free, private and high quality — no catch.
- Everything runs in your browser — your file is never uploaded.
- High-quality pitch shifting with optional formant preservation.
- No account, no watermark, no install.
Pitch changer vs. Auto-Tune & musical key
A pitch changer transposes the whole track by a fixed amount. It's not Auto-Tune or pitch correction, which retunes individual notes to fix tuning.
“Key” here means the musical key of the song (like F♯ minor), not a key fob or password. Changing the key transposes every note up or down together.
Frequently asked questions
Is this pitch changer free?
Yes. It's completely free, with no account, watermark or limits beyond a 10-minute file length. Everything runs in your browser.
Is my audio uploaded anywhere?
No. Your file is decoded and processed entirely in your browser — it never leaves your device.
What's the difference between changing key and changing speed?
Changing key (pitch) moves every note up or down without changing the tempo, so a major song stays major. Changing speed makes the song faster or slower. Here you can adjust each independently — to change only the key, move pitch and leave speed at 100%.
How many semitones should I change a song's key by?
Start with 2–3 semitones down if the song sits too high, or up if it sits too low. Most singers find the right key within 4 semitones either way, and 12 semitones is a full octave. If you'd rather not count, pick a target key and the tool works out the shift for you.
How do I transpose a song to a different key?
Load your audio file, then either move the pitch slider by a number of semitones or choose a target key (the song's current key is detected for you). Keep speed at 100% to leave the tempo alone, preview the result, then export WAV or MP3.
Is a pitch changer the same as Auto-Tune?
No. A pitch changer shifts the entire track by a set number of semitones. Auto-Tune corrects the pitch of individual notes.
How do I make a slowed + reverb version?
Click the Slowed + Reverb preset. It slows the track and adds reverb; you can fine-tune the speed and export the result.
What files can I use and export?
Load MP3, WAV, FLAC, M4A and most common audio formats. Export to lossless WAV or compressed MP3.
Will changing the pitch sound natural?
We use high-quality pitch shifting with optional formant compensation. Shifts of up to about 4 semitones usually sound clean on a full mix; 5–7 are noticeable on vocals; beyond that, any tool introduces artifacts. If a big shift sounds wrong, try going the other direction to the same key.
Is there a length limit?
Files up to 10 minutes are supported in the browser. For longer files, contact us and we'll help.
Need the vocals or instrumental too?
Split any song into vocals, drums, bass and more with StemSplit — then repitch each stem.
Try StemSplit free