Free Online Tool

Voice Pitch Shifter

Raise or lower pitch up to ±12 semitones — directly in your browser. No uploads, no account, no watermarks.

About

What is a Voice Pitch Shifter?

A pitch shifter changes the musical key of a voice or audio recording without altering its playback speed. Unlike slowing down a track — which lowers both pitch and tempo together — a true pitch shifter uses DSP algorithms to modify frequency independently, so your audio stays exactly the same length.

SonicLab’s pitch shifter runs entirely in your browser using the Web Audio API. No files are sent to any server. No account required.

How It Works

Three steps to shift pitch

  1. Upload your audioDrag and drop any MP3, WAV, M4A, FLAC, or OGG file (up to 100 MB). Nothing leaves your device.
  2. Set your pitchDrag the slider or tap a preset to shift pitch by up to ±12 semitones. Preview plays instantly.
  3. Download the resultExport as lossless WAV or compressed MP3 at 192 kbps. Original tempo is preserved in the export.
Use Cases

Who uses a pitch shifter?

  • Music ProductionTranspose vocals or samples to a different key without re-recording. Create harmonies or octave doubles.
  • Voiceover & PodcastsAdjust speaker pitch for character voices, anonymization, or tonal consistency across a production.
  • Gaming & StreamingCreate character voices for streaming or voice-acting. Use presets like Chipmunk or Deep Voice instantly.
  • Privacy & AnonymizationA few semitones of shift makes a voice unrecognizable — useful for whistleblower or witness recordings.
  • Film & Post-ProductionPitch correction, ADR matching, alien voice design, or stylistic effects for trailers and essays.
  • Language & EducationAdjust pitch to improve clarity for hearing-impaired listeners or aid phonetic analysis.
FAQ

Common questions

Does pitch shifting change the audio tempo?
Not in the exported file. SonicLab uses a two-pass OfflineAudioContext pipeline that shifts pitch and then time-stretches the result back to the original duration. The preview may slightly change speed, but the download always preserves your original timing.
What is the difference between pitch shifting and formant shifting?
Pitch shifting changes the fundamental frequency — making a voice sound higher or lower. Formant shifting changes the resonant frequencies of the vocal tract, altering the perceived "size" or gender of the voice without changing pitch. SonicLab adjusts pitch; formant shifting requires more advanced DSP.
How many semitones can I shift?
Up to ±12 semitones — one full octave up or down. For the best quality, keep shifts under 5 semitones. Larger shifts will introduce more artifacts.
Is my audio uploaded to a server?
No. All processing happens entirely in your browser using the Web Audio API. Your files never leave your device.
What audio formats are supported?
MP3, WAV, M4A, FLAC, and OGG. Maximum file size is 100 MB. You can export as WAV (lossless) or MP3 at 192 kbps.
Will the output sound robotic or artificial?
For small shifts (1–5 semitones), quality is generally very good. Larger shifts will sound less natural with any browser-based tool. For professional-grade formant-preserving results, dedicated desktop software like Melodyne offers higher quality.