Shrink video size — MP4 compression

Use this to shrink a video to fit size limits for email attachments, messaging apps, or assignment submissions. Short videos are processed on your device; longer ones (up to 95MB) can use [Fast on server] for GPU compression.

The file is never sent to a server — processed entirely in this browser

How to use Shrink video size

1Select a video.
2Choose a resolution (e.g. 720p) and compression level, or set a target size.
3Click [Compress] and save once the progress bar finishes.

Frequently asked questions

How long does it take?

On-device processing takes about 1–5 times the video's length. Choose [Fast on server] and a GPU usually finishes much faster than the video's length.

Is server-side processing safe?

After compressing on the server, the original and result are deleted as soon as you download it. They're also deleted automatically after 40 minutes even if you don't.