Free Online Pitch Shifter
Shift a track up or down by semitones, tempo preserved.
What is this tool
AudioToolKit shifts the pitch of audio online for free, in your browser. Move any track between -12 and +12 semitones — a full octave in either direction — while a time-stretch algorithm keeps the tempo and duration exactly the same. Use it to transpose a song to fit a voice, harmonize a layer, or retune to 432 Hz, then export as MP3 or WAV.
Drag and drop your files here
or
MP3, WAV, M4A, AAC, OGG, FLAC, AIFF, AIF, OPUS, WMA, AMR — up to 25 MB per file
Output
Pitch-shifted MP3 or WAV
Accepted formats
.mp3, .wav, .m4a, .aac, .ogg, .flac, .aiff, .aif, .opus, .wma, .amr
Why use this free tool
Transpose a song to suit a voice, harmonize a layer, or retune a track to 432 Hz. The pitch shifter moves the key by semitones while keeping duration and tempo exactly the same.
How does the free pitch shifter work?
- 1
Upload the track.
- 2
Set the shift in semitones: +2 raises it, -2 lowers it.
- 3
Press Process and download the transposed track.
Frequently asked questions
Does the tempo change?
No. The shift is time-stretch compensated, so the track keeps its original duration.
How far can I shift?
Between -12 and +12 semitones, a full octave in either direction.
Can I retune to 432 Hz?
Yes — use the 432 Hz preset, which applies the exact -0.32 semitone shift.
Related tools
More answers in the Help Center.