Pitch Shifter
Raise or lower the pitch of an audio file by a number of semitones, without changing its length. Runs entirely in your browser; your file never leaves your device.
Everything runs locally in your browser. Your audio is never uploaded. The first run downloads the engine (~25 MB); after that it is cached.
About this tool
The pitch shifter moves an entire audio file up or down by a number of semitones while keeping its original length. Twelve semitones make an octave, so you can nudge a track a couple of steps to fit a singer's range or move it a full octave. It is handy for transposing a backing track to a comfortable key, matching an instrument to a recording, or making a quick reference version in a different key without re-recording anything.
Be clear about what this is: a pitch shift, or transpose, tool. It is not auto-tune and it is not pitch correction. It moves the whole file by the fixed interval you choose and does not detect notes or snap anything to a scale. True automatic pitch correction is a much heavier processing task; SecureVault may offer a server-based version of that alongside its vocal isolation tool. Because this build of ffmpeg does not include rubberband, the tool preserves duration by resampling to change pitch and then compensating the tempo. Nothing is uploaded — a WebAssembly build of ffmpeg does the work on your own machine.
How to use it
Set an interval and export:
- Choose an audio or video file, or drag it onto the drop area.
- Set the number of semitones, from -12 down to +12 up, using the slider or the exact-value box.
- Select an output format — MP3 for a small shareable file, WAV for a lossless copy.
- Select Shift pitch, wait for the progress bar, then download the result.
Common questions
Does my audio get uploaded to a server?
No. The processing runs entirely in your browser using a WebAssembly build of ffmpeg. Your file is read locally and never leaves your device, which is why the first run downloads the engine but later runs are quick.
Is this the same as auto-tune or pitch correction?
No. This is a pitch shift, or transpose, tool. It moves the entire file by a fixed interval that you choose, in semitones. It does not detect notes and does not snap anything to a scale, so it is not auto-tune or pitch correction. True automatic pitch correction is a much heavier processing task.
Does the length of the audio change?
No. The tool resamples to change pitch and then compensates the tempo so the duration stays the same. Shifting by a large interval, near the limits of plus or minus twelve semitones, can introduce audible artifacts, which is normal for this resampling method.
Need to change formats or extract audio from a video first? Try the audio format converter. For heavier media and automation work, see our development and automation service.