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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%

Reverse video — MP4 files, without uploading

Play a clip backwards, starting from MP4 video — here in this tab, with nothing uploaded.

How to reverse video (MP4)

Drop your MP4 file in.
Reverse it.
Save the reversed clip.

Why this one stays private

Reversing needs the whole clip in memory at once — which is exactly why doing it in the tab, where the clip already is, beats sending it somewhere first.

Questions

Does this work with MP4 files?

Yes — that is what this page is set up for. MP4 is the format everything plays, and the safe answer when you are not sure.

Does the audio reverse too?

You choose. Reversed audio is usually not what you want, so it can be dropped or kept playing forwards.

Is there a length limit?

Reversing holds the whole clip in memory, so very long videos are the one case where your machine's RAM is a real limit.

How to reverse video (MP4)

Why this one stays private

Questions

The same tool, other formats