Change Video Speed Online

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

Need help with the calculation?
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
Exact settings
In queue0
Done0
Size saving-
Add MP4/MOV/WEBM files.
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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.

Recommended settings

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

Privacy

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

Limits

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