Audio Speed Changer

Speed up a podcast or slow down a track for practice — pitch stays natural. All in your browser.

Drop Audio

Speed up or slow down without the chipmunk effect — pitch is preserved.

Engine Status

IDLE

Speed

1.5×

Pitch is preserved (no chipmunk effect) via chained atempo filters.

Change speed without changing pitch

Speeding up audio the naive way makes everyone sound like a chipmunk. This tool uses time-stretching (FFmpeg's atempo filter, chained so anything from 0.25× to 4× works) so a voice or song keeps its natural pitch — just faster or slower. Great for getting through a lecture quickly, or slowing a musical passage down to learn it.

Everything runs locally in your browser; the audio is never uploaded. The output keeps your file's original format.

Support Us

Fuel the Developer

Enjoying the tools? Feel free to buy us a coffee. Regardless we will always remain fast, private and free :)

Tap to support the project.

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Did you know?

Tech

The 1998 April Fools' joke protocol for controlling coffee pots over the web included a real proposed HTTP method called BREW and a header called "Accept-Additions" for specifying milk or cream.

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