Can I keep the original pitch?

The tool aims to retimes audio naturally; results depend on the engine preset.

Yes. Change audio speed online free.

Are uploads required?

No. Speed changes run in your browser.

Speed up or slow down audio online while keeping pitch natural. Free audio speed changer in your browser.

Audio

Processed in your browser with FFmpeg.wasm. The first run downloads the engine (~31 MB); media never leaves your device.

Speed up or slow down without a harsh pitch jump

Drop audio to retime

Great for lectures, podcasts and practice tracks

0.25× to 4×

Custom speed

Export format

Adjust playback speed for practice, podcasts, and reviews without a desktop DAW.

Processing is local and private.

Can I keep the original pitch?: The tool aims to retimes audio naturally; results depend on the engine preset.
Is this free?: Yes. Change audio speed online free.
Are uploads required?: No. Speed changes run in your browser.