Change Video Speed Online

Speed up or slow down MP4, MOV or WEBM locally in the browser with preview and exact percentage control.

Files are not sent to a server. Processing runs in your browser, and the queue handles one file at a time so the device stays responsive.

Drop MP4/MOV/WEBM files here or tap to choose several files

No files selected.

Speed changes locally. Check the video in preview; the final MP4 is assembled in the browser after clicking “Process”.

Quick speed choice

Speed 150% CRF quality 28 Mute after speed change

Exact settings

Exact speed, % Exact CRF

In queue0

Done0

Size saving-

Add MP4/MOV/WEBM files.

How to use it

Add a video, choose a speed preset or exact percentage and check the preview. The final MP4 is created on your device.

Use 150-200% for clear acceleration and 50-80% for slow motion. Mute audio if the changed sound is not useful.

Your files are not uploaded to a server. The editor runs in your browser with local libraries from this site.

Large images can take longer on phones. If the browser slows down, process fewer files at once or choose a smaller output format.