atempo preserves pitch while changing tempo.

Change Audio Speed

Speed up or slow down audio without changing pitch too much.

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About Change Audio Speed

Adjust audio tempo using ffmpeg's atempo filter. Runs entirely in your browser.

Open the Change Audio Speed tool and add your file. It's processed in your browser, never uploaded.
Adjust the available options to get the result you want.
Download the result. There's no sign-up, no watermark, and no size cap.

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