AudiowaveAudioWave

Upload an audio file, then adjust the pitch in semitones (±12). Speed remains unchanged.

Click or drag & drop an audio file here

How to Change Audio Pitch Online – Free Pitch Shifter Guide

Learn how to shift audio pitch online free. Raise or lower the key of any song by ±12 semitones without changing speed. Perfect for music transposition, voice effects, instrument tuning, and creative sound design. No signup needed.

How Does Pitch Shifting Work?

Pitch shifting changes the frequency content while preserving duration. Our tool uses FFmpeg's asetrate filter (resampling) combined with atempo to restore speed, effectively changing the pitch by semitones. Positive semitones increase pitch (higher frequency), negative semitones lower it. The result sounds natural and preserves the original tempo.

Step‑by‑Step to Change Pitch

  1. Upload your audio file (MP3, WAV, FLAC, etc.).
  2. Use the slider or number input to set semitones (-12 to +12).
  3. Click 'Change Pitch' – processing starts automatically.
  4. Preview the adjusted audio using the MP3 version.
  5. Download the pitch‑changed file in the original format.

Frequently Asked Questions

1. Does shifting pitch affect audio quality?
Moderate shifts (±6 semitones) are very clean. Extreme shifts may introduce minor artifacts, but the tool uses high‑quality resampling.
2. Can I change pitch without changing duration?
Yes, that's exactly what this tool does. Speed and duration stay the same.
3. What is a semitone?
A semitone is the smallest musical interval in Western music (e.g., C to C#). 12 semitones equal one octave (double/half frequency).
4. Is my audio uploaded to a server?
No. All processing happens locally in your browser using FFmpeg.wasm. Your files stay private.
5. Why does the output file size change?
Pitch shifting via asetrate+atempo introduces slight resampling, which may slightly alter file size, but duration remains identical.

Shift Pitch for Music, Voiceovers, and Creative Projects

Whether you need to transpose a song to a different key, create a funny voice effect, or design unique soundscapes, our free pitch shifter gives you precise semitone control. No signup, no watermarks, completely private.