The short version
- Drop in a song, press Preview, move the Key slider. Each step is one semitone, and the tempo doesn’t budge.
- Singers: try −2 first. Two semitones down is the most common “now I can actually sing it” fix.
- Tell it the original key and it names the new one, plus the capo or tuning that matches on guitar.
- Small shifts sound natural. ±1–3 semitones is clean on almost anything; ±7 and beyond is a (fun) effect.
- Download a WAV when it sounds right. Your file never leaves your device: no upload, no account, no watermark.
How to change the key of a song
- Drop an audio file onto the box or press “Choose a file”. No song handy? Press “Try the demo loop”.
- Press Preview (or the space bar). Click the waveform to jump to the chorus, because that’s the bit you’re worried about.
- Move the Key slider, or use the − and + buttons for exact semitone steps. It changes live while the song plays.
- Press “Hear the original” to flip back and compare. Your ears get used to a new key in about four seconds, so check often.
- Pick the original key in the box underneath to see the new key and the guitar capo position.
- Press “Download WAV”. It renders in a few seconds and is named after the change, like “your song (−2 semitones).wav”.
Sing the hardest line, not the easiest. Loop the highest note in the chorus and step down one semitone at a time until it stops feeling like a dare. Then go one more for live nerves. If the verses go too low and mumbly, you’ve gone too far: come back up one.
How many semitones should I shift?
A semitone is one piano key, black or white, or one fret on a guitar. Twelve of them make an octave. Here’s what each step does and what it means on a guitar.
| Shift | Interval | Sounds like | On guitar |
|---|---|---|---|
| ±1 | Half step | Barely noticeable to most listeners | Capo 1 (up) or E♭ tuning (down) |
| ±2 | Whole step | Natural; the classic singer fix | Capo 2 (up) or D standard (down) |
| ±3–4 | Minor / major third | Clean on instruments; voices start to change colour | Capo 3–4 |
| ±5 | Perfect fourth | Clearly a different key; voices sound younger or bigger | Capo 5 |
| ±7 | Perfect fifth | An effect on vocals; fine for pads and drums | Capo 7 |
| ±12 | Octave | Chipmunk (up) or ogre (down), same notes | 12th fret / an octave |
From one key to another: a quick cheat sheet
Count the piano keys from the old key note to the new one, and take the shorter way round. More than 6 semitones up is always closer going down. Minor keys count the same way: A minor to G minor is −2.
| From | To | Shift | Why people do it |
|---|---|---|---|
| E major | D major | −2 | Rock songs that sit too high for most voices |
| A major | G major | −2 | Easier open chords and a friendlier chorus |
| G major | E major | −3 | Lower voices singing a song written for a tenor |
| C major | D major | +2 | More lift and brightness for higher voices |
| F major | G major | +2 | Guitar-friendly key for playing along |
| A minor | E minor | −5 | Darker, heavier; the metal favourite |
| Any key | Same key, A = 432 Hz | −32 ¢ | The 432 Hz crowd (see below) |
Want to see how keys relate before you jump? The circle of fifths shows every key’s neighbours, and keys next to each other on the circle are the smoothest swaps.
Why do big pitch shifts sound like chipmunks?
Because a voice has two kinds of pitch. There’s the note being sung, and there are formants, the resonances of the singer’s throat and mouth that make a voice sound like that particular person. A simple pitch shifter moves both, so after a big shift it sounds like a smaller (or much bigger) person singing. A couple of semitones hides it well. Seven or more and the singer has clearly inhaled helium, or swallowed a cello.
Drums and pads cope much better than voices, which is why a whole band track shifted by ±3 often sounds totally fine while the solo vocal gives the game away.
| Tool | Pitch | Speed | Best for |
|---|---|---|---|
| Pitch shifter (this page) | Changes | Stays the same | Singing in your key, playing along, matching a key |
| Tempo changer | Stays the same | Changes | Learning songs, transcribing, hitting a target BPM |
| Slowed + reverb | Lower | Slower | The dreamy 3 a.m. version |
| Sped up / nightcore | Higher | Faster | The TikTok version |
440 Hz to 432 Hz
Most music is tuned so the A above middle C is 440 Hz. Some people prefer A = 432 Hz, which is 31.8 cents lower: less than a third of a semitone. The “440 → 432 Hz” preset does exactly that and leaves the tempo alone. Plenty of grand claims are made about 432 Hz; I’ll just say it sounds very slightly warmer and darker, a bit like the same song on a cloudy day. If you want to go down that rabbit hole properly, my sister site Sacred Frequency has the tones.
Changing the key of a Suno song
Suno picks the key for you, and it’s often not the one you’d sing in. Here’s what I do: generate the song, run it through the BPM & key finder, then shift it here into a key that suits my voice (or my guitar). For a cover, a demo or a duet with your AI singer, that’s usually all it takes.
Better still, ask Suno for the right key in the first place. It doesn’t always listen, but putting the key in the style line helps:
Acoustic pop ballad in D major, 84 BPM, warm fingerpicked acoustic guitar, soft piano, gentle strings, intimate male vocal, mid-range melody, heartfelt, hopeful
Not sure what your range is? The vocal range test finds it and suggests a key, and the vocal pitch monitor shows whether you’re actually hitting the notes once you’ve shifted.
Why I built this
I play guitar (a Cort, a lot of enthusiasm, roughly twelve notes) and I sing, if you’re generous. Half the songs I want to play along with are in a key that’s either too high for me or full of barre chords that make my hand cramp. The usual fix was an app with a subscription, or a website that wanted my song uploaded to who-knows-where.
So this runs in your browser, and the song never leaves your device. I added the “Hear the original” button because after thirty seconds in a new key, everything sounds normal and you forget what you changed. Ask me how I know.
How it works, and what it does with your file
Your browser decodes the file with the Web Audio API. The pitch shifter then cuts the audio into overlapping slices about 48 ms long, re-plays each slice faster or slower to move the pitch, and lays the slices back down at the original pace so the tempo stays the same. Before placing each slice it searches a few milliseconds either side for the spot whose waveform lines up best with the last one (a method called WSOLA), which keeps it from sounding phasey or robotic.
The live preview runs in an audio worklet so the sliders respond instantly. The download runs the exact same code on the whole song, checks it for clipping and saves a 16-bit WAV. Nothing is uploaded, there’s no account, and the page makes no network requests while it works.
Pitch shifter FAQ
How do I change the key of a song?
Open the song in the pitch shifter, press Preview and move the Key slider: each step is one semitone (one piano key or one guitar fret). Pick the original key in the box below and it shows the new key. When it sounds right, press Download WAV.
Does changing the key change the speed?
No. The tempo and length stay exactly the same, and only the pitch moves. If you want to change the speed too, there’s a separate Speed slider, and the tempo changer is built for slowing songs down without changing the pitch.
How many semitones do I need to go from one key to another?
Count the piano keys (black and white) from the old key note to the new one. C to D is +2, E to D is −2, A to G is −2 and G to E is −3. Take the shorter way round: anything more than 6 up is closer going down.
How much can I pitch shift before it sounds weird?
One or two semitones sounds natural on almost anything. Three to five is fine for instruments, but voices start to sound a bit younger (up) or bigger (down). Beyond that it becomes an effect: chipmunk up, ogre down. That’s because a voice’s formants move along with the notes.
What is a semitone, and what are cents?
A semitone is the smallest step in Western music: one piano key or one guitar fret. Twelve semitones make an octave. A cent is a hundredth of a semitone, used for fine-tuning a track that is slightly sharp or flat, or tuned to something other than A = 440 Hz.
Can I convert a song from 440 Hz to 432 Hz?
Yes. Press the 440 → 432 Hz preset, which lowers the pitch by 32 cents (432 Hz is 31.8 cents below 440 Hz) without changing the tempo. Whether it sounds better is between you and your ears.
What is the difference between a pitch shifter and the slowed or sped-up makers?
The slowed + reverb and sped-up makers work like a record at the wrong speed, so speed and pitch move together. A pitch shifter time-stretches the audio so the pitch can move while the tempo stays put, and vice versa.
Does this upload my song anywhere?
No. The file is decoded and processed in your browser and the WAV is created on your device. Nothing is uploaded, there’s no account and there’s no watermark.
What file formats work?
MP3 and WAV work in every browser. M4A, AAC, FLAC and OGG work in most. The download is a 16-bit WAV, which you can convert to MP3 if you need a smaller file.
Can I use it to change a song into my vocal range?
That’s exactly what it’s for. Find your comfortable range with the vocal range test, then shift the backing track down if the chorus is a strain, or up if the verses are mumbly. Two semitones down is the most common fix.
Write it in the right key from the start
The free Paddy Prompt Studio builds Suno style prompts and Vidmuse video scripts. Pick a genre, mood, vocal and key, and it writes the style line for you.
Open the Prompt Studio →