Audio Speed Changer Online

Slow down or speed up audio from 0.5× to 2× without changing its pitch. Preview the new tempo and export the result directly in your browser.

How to change audio speed

Change audio tempo in three steps

Choose a file, preview a slower or faster tempo, and download the changed audio directly to your device.

  1. 01

    Choose an audio file

    Select a supported audio file from your device. The source file remains in your browser.

  2. 02

    Choose and preview the speed

    Select a speed from 0.5× to 2× and use the audio player to hear the new tempo before exporting.

  3. 03

    Export and download

    Choose MP3, M4A, or WAV and save the speed-adjusted audio directly to your device.

Private audio speed changer

Adjust audio tempo without uploading your file

Use AudioTidy for practice, lessons, podcasts, interviews, or quick playback changes without installing editing software.

Keep the original pitch

Change the tempo while voices and music stay at their original pitch instead of becoming unnaturally high or low.

Preview before exporting

Listen at the selected speed and compare the original and adjusted duration before creating the new file.

Files stay on your device

Your source audio is processed locally in your browser instead of being uploaded to a remote server.

Audio speed changer FAQ

Frequently asked questions about changing audio speed

Learn how tempo, pitch, preview, output formats, and local browser processing work.

How do I speed up or slow down an audio file?

Choose an audio file, select a speed from 0.5× to 2×, preview it, then choose an output format and download the changed audio.

Will changing speed also change the pitch?

No. The exported audio changes tempo while keeping the original pitch.

Can I preview the new speed before downloading?

Yes. The audio player uses your selected speed immediately, so you can listen before exporting.

Which output formats are available?

You can export the speed-adjusted audio as MP3, M4A, or WAV.

Is my audio uploaded to a server?

No. Your source file stays on your device and is processed locally in your browser.

Can I change the speed of large audio files?

There is no server upload limit. The practical limit depends on your device memory, browser, and source file.