💡Quick Answer

Change audio playback speed (0.25x to 4x) using browser-based phase-vocoder time-stretching. Preserve original pitch (key) or disable correction for classic pitch-shifting effects.

Audio Speed Changer

Change audio playback speed without affecting pitch.

Drag & drop audio file

or click to select

MP3, WAV, M4A, AAC, OGG, WEBM supported • Max 100MB

Your audio stays on your device

How to Use This Tool

  1. 1

    Upload your audio file

  2. 2

    Adjust the Speed slider (0.25x to 4x)

  3. 3

    Toggle "Preserve Pitch" if needed

  4. 4

    Click "Prepare Export"

  5. 5

    Download as WAV or MP3

Frequently Asked Questions

Yes! Our tool uses advanced time-stretching to preserve the original pitch (key) of your audio while changing the tempo. You can also disable this to get the classic "chipmunk" or "slow-mo" effect.

Absolutely. It's perfect for musicians who want to slow down a fast solo or complex passage to learn it note-by-note.

To make Nightcore, increase the speed (e.g., 1.25x or 1.5x) and UNCHECK "Preserve Pitch". This raises both the tempo and the pitch for that classic high-energy sound.

Slowing down significantly (below 0.75x) with pitch correction can introduce "robotic" artifacts due to the complex processing required. Speeding up usually sounds very clean.