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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 file hereto convert it

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

Colours 6 Detail 1 Smooth curves

Shape Size Across Down Border

Text Where

100%

Convert MP4 files online, without uploading them

Turn an MP4 file into MOV, WMV, AVI, WebM and more - here in this tab, with nothing uploaded.

How to convert MP4 files

Drop your MP4 file in.
Pick the format you need and press Convert.
Save the converted file.

Why this one stays private

Converting a video elsewhere means uploading the whole thing, waiting, and trusting a stranger's server with footage that may not be yours to hand over. The conversion happens here instead.

Questions

What can I convert MP4 to?

MOV, WMV, AVI, WebM and more. MP4 is the format everything plays, and the safe answer when you are not sure, so the usual reason to convert is to get a file that opens where this one does not.

Does converting lose quality?

Only when it has to. If the video inside already suits the new format it is copied across untouched - MKV to MP4 with H.264 inside loses nothing and takes seconds. Otherwise the picture is re-encoded at a quality setting high enough that the difference is hard to see.

Is the sound kept?

Yes. The audio is copied across when the new format can hold it, and converted when it cannot.

How to convert MP4 files

Why this one stays private

Questions

The same tool, other formats