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Audio Speed Changer

Speed up or slow down audio between 0.5x and 2.0x. Pitch lock keeps voices and instruments in their original key. Processing happens on your device, with no upload.

Processed on your device Audio toolsAccepts MP3, WAV, OGG, FLAC, AAC, M4A

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How to use Audio Speed Changer

  1. 1

    Drop an audio file.

  2. 2

    Set the speed and choose whether to keep the pitch.

  3. 3

    Process and download.

Features

  • 0.5x – 2.0x in 0.05 steps
  • Pitch lock (time-stretch) in a Web Worker
  • Instant preview of the setting
  • MP3 or WAV export

Frequently asked questions

How do I slow down a song without changing the pitch?

Set the speed below 1.0x and keep pitch lock on. The tempo slows while the key stays the same.

Can I speed up a podcast or lecture?

Yes. Speeds of 1.25x–1.5x with pitch lock keep speech clear while saving time.

What is pitch lock?

With pitch lock the tempo changes but the key stays the same. Without it, faster audio also sounds higher, like a tape machine.

Are my files uploaded to a server?

No. Audio Speed Changer runs entirely in your browser, so your files stay on your device. Nothing is uploaded, stored or seen by anyone else.

Is Audio Speed Changer free?

Yes. It is completely free, with no sign-up and no watermarks.