Online Pitch Shifter
Change the pitch or key of a voice, song, or audio file by up to ±12 semitones. Free in your browser, with no uploads, account, or watermark.
What Is an Online Pitch Shifter?
A pitch shifter raises or lowers the notes in recorded audio. To change a song’s key, count the semitones from its current key to the target key, set that amount on the slider, preview, then export. Positive values raise pitch; negative values lower it. Start with one to three semitones for a modest change.
Pitch and tempo are different controls: changing playback speed changes both together, while time stretching changes duration while aiming to preserve pitch. SonicLab keeps the original duration: it time-stretches the audio and resamples it back, so only the pitch changes. The preview and the downloaded file are the same processed audio. Results can develop artifacts, especially with large shifts or dense mixes.
A semitone is one half-step in Western equal temperament; 12 semitones make an octave. A cent is one hundredth of a semitone for fine tuning. This control works in semitones. For help finding a song’s key, try the key and BPM finder.
Quick answer: Upload your audio, move the pitch slider up or down by the required semitones, preview, then export. The tool accepts MP3, WAV, FLAC, M4A, and OGG files up to 100 MB and exports WAV or MP3 at 192 kbps. Files are processed locally in your browser. Last updated: October 2, 2026.
| Pitch range | −12 to +12 semitones |
|---|---|
| Input | MP3, WAV, FLAC, M4A, OGG; up to 100 MB |
| Export | WAV or MP3 at 192 kbps |
| Processing | In your browser; no account required |
| Fine cents control | Not available |
| Formant preservation | Not available |
Pitch shifting vs. tempo and speed
| Operation | Changes | Typical use |
|---|---|---|
| Pitch shifting | Musical pitch or key | Transpose a song or voice |
| Time stretching | Duration and tempo | Match BPM while aiming to keep pitch |
| Playback speed | Pitch and tempo together | Tape-style speed change |
| Pitch correction | Individual notes toward a target | Correct off-key singing |
Pitch shifting is not a harmonizer: a harmonizer adds shifted copies to create intervals. Pitch correction detects notes and moves them toward a scale. Use the tempo changer when your goal is to change BPM.
How to get a natural-sounding shift
- Try one to three semitones first; large shifts are more likely to sound artificial.
- Start from clean WAV or FLAC audio when possible and avoid processing the same file repeatedly.
- Listen to consonants and drum hits, where smearing or metallic artifacts can stand out.
- Pitch-only shifting does not preserve formants, the resonances that shape vocal tone. Dedicated vocal software offers more control.
Three steps to shift pitch
- Upload your audioDrag and drop any MP3, WAV, M4A, FLAC, or OGG file (up to 100 MB). Nothing leaves your device.
- Set your pitchDrag the slider or tap a preset to shift pitch by up to ±12 semitones. Preview plays the processed result after a brief render.
- Download the resultExport as lossless WAV or compressed MP3 at 192 kbps. The file keeps its original length and tempo, and matches the preview.
How this tool works
Your browser decodes the selected audio with the Web Audio API. When you move the slider, the tool time-stretches the audio with a waveform-similarity overlap-add (WSOLA) algorithm and resamples it back to its original length, which shifts the pitch without changing the tempo. The preview plays that processed audio and the download encodes the same audio, so they match. This is local browser processing; no file upload or account is needed. Pitch shifting can still add audible artifacts, particularly on large shifts.
Who uses a pitch shifter?
- Music ProductionTranspose vocals or samples to a different key without re-recording. Create harmonies or octave doubles.
- Voiceover & PodcastsAdjust a voice for a character or creative effect. Pitch changes are not reliable voice anonymization; other vocal traits may still identify a speaker.
- Gaming & StreamingCreate character voices for streaming or voice-acting. Use presets like Chipmunk or Deep Voice instantly.
- Creative voice effectsTry higher or lower pitch for a different character sound. A pitch shift can sometimes be reversed and should not be relied on to protect identity.
- Film & Post-ProductionCreate stylized effects or adjust a voice recording. Pitch shifting alone does not correct individual off-key notes.
- Language & EducationAdjust pitch to improve clarity for hearing-impaired listeners or aid phonetic analysis.