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dashutils

Change Audio Speed

Listen to lectures faster, or slow a song down to learn it. The tempo changes while the pitch stays natural.

  • Free, no sign-up
  • Files never leave your device
  • Powered by FFmpeg
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Your files are processed on this device and are never uploaded to a server.

How to use the Change Audio Speed

  1. 1

    Choose an audio file.

  2. 2

    Pick the speed.

  3. 3

    Process and download.

Pitch preserved

FFmpeg's atempo filter changes tempo while keeping pitch, so voices still sound natural at 1.5× or 2×.

Frequently asked questions

Is my audio uploaded?

No. Audio is processed in your browser with FFmpeg compiled to WebAssembly. Nothing is uploaded.