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Why this runs on your computer

There is no upload: The work happens in this tab. Your file never travels, so there is no copy of it anywhere but your own disk.
Nothing to delete later: Sites that upload promise to delete your file afterwards. That promise only matters because the file was theirs to hold.
It works with the Wi-Fi off: The honest test. Turn off your connection and the tools keep working, because everything they need is already here.

Drop your video hereto load the tools

Nothing is uploaded — the tools run right here

Applies to every loaded image

Look Strength 100% Brightness Contrast Saturation Vibrance Vignette

Max width Format Shape

Shape Size Across Down Border

Text Where

100%

Compress video — WebM files, without uploading

Make a clip smaller without making it look bad, starting from WebM video — here in this tab, with nothing uploaded.

How to compress video (WebM)

Drop your WebM file in.
Choose how small you need it.
Save the smaller file.

Why this one stays private

A video is the one file people are asked to upload twice: once to shrink it, once to actually send it. Shrinking it here means the only copy that ever leaves your machine is the one you meant to send.

Questions

Does this work with WebM files?

Yes — that is what this page is set up for. WebM is small and made for the web, though older players and editors ignore it.

How much smaller will it get?

That depends on the clip. Footage with a still camera and a plain background shrinks a long way; fast motion and grain resist it. You will see the size before you save.

Will it look worse?

A little, by definition — compression works by discarding what you are least likely to notice. The point is to spend that loss where it does not show.

How to compress video (WebM)

Why this one stays private

Questions

The same tool, other formats