Change video speed online, free

Drop a clip, pick a speed from 0.25x to 4x, and export. Audio stays in tune by default, or switch that off for the classic chipmunk effect. Everything runs on your device.

Drop your video here

or click to choose a file

MP4, MOV, WebM, MKV

Works in Chrome, Edge and Safari 17 or newer. Nothing is uploaded.

How it works

1

Drop your video

MP4, MOV, WebM or MKV. It opens instantly because nothing is uploaded.
2

Choose the speed

Tap a preset or drag the slider. The preview plays at the new speed and shows the new length.
3

Export and download

Rendered on your device at the original resolution.

Questions people ask

Will the audio sound like a chipmunk?

Not unless you want it to. By default the audio is time-stretched so voices keep their pitch. Turn off "keep pitch" to let the pitch rise or fall with the speed.

How slow or fast can I go?

From 0.25x (four times slower) to 4x (four times faster). Slowing down does not invent new frames, so very slow speeds look like a smooth hold on each frame.

Do you upload my video?

No. The tool runs entirely in your browser. Your file stays on your device.

Which formats work?

MP4 and MOV with H.264 or HEVC, plus WebM and MKV with VP8, VP9 or AV1. The export is an MP4, or a WebM when the source was WebM.

Which browsers are supported?

Chrome, Edge and Safari 17 or newer on desktop and Android. Firefox does not support the video APIs the tool needs yet.

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