Pitch Shifter & Key Changer
Move a song into a key that suits your voice or instrument - up or down by semitones, same tempo. Or retune from 440 Hz to 432 Hz in one click.
🔒 Your audio is never uploaded - it's processed right here in your browser.
How it works
Open a song
Any MP3, WAV, M4A, OGG or FLAC - nothing is uploaded.
Choose the shift
Semitones up or down, fine-tune in cents, or one-click 432 Hz. Press play to hear it.
Save
Download the shifted version as MP3 or WAV - tempo and length unchanged.
How to change the key of a song without changing the tempo
Too high to sing? Need it in your guitar's key? This free pitch shifter and key changer moves a whole song up or down by semitones while the speed stays exactly the same. It also converts 440 Hz to 432 Hz.
Open the song
Drop an MP3, WAV, M4A, OGG or FLAC onto the box. Nothing is uploaded.
Shift the key
Press a Quick shift (−2, −1, +1, +2) or drag Key change anywhere from −12 to +12 semitones. One semitone is one piano key.
Listen
Press play (or click the waveform) to hear the shifted version before saving.
Optional: see the new key
Choose the Song's key to see which key you've moved it to. Don't know it? Find it with the key finder.
Fine-tune or retune to 432 Hz
Use Fine tune (in cents) to match a slightly-off recording, or press 440 → 432 Hz.
Save
Pick MP3 or WAV and press Save shifted song - same length, same tempo.
Frequently asked questions
How many semitones should I shift to fit my voice?
If the song feels too high, try −1 or −2 first; too low, +1 or +2. Each step is one piano key. Beyond about 4 semitones voices start to sound unnatural - that's physics, not the tool.
Does it change the speed?
No. The song is time-stretched and resampled together so the length and tempo stay exactly the same while every note moves.
What does 440 to 432 Hz do?
It lowers the whole song by 31.8 cents so that A sits at 432 Hz instead of the standard 440 Hz. Some listeners prefer the warmer feel; it's a matter of taste.
Can I find out the song's key first?
Yes - run it through our free Key & BPM Finder, then pick that key here to see the new one.
Is my song uploaded?
No. The pitch shifting runs in your browser - nothing is uploaded.
Want a song written in your key from the start?
Generate an original track in the Swara Sound studio - lyrics, style and vocals of your choice, and you keep every file.
Speed and pitch
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