Disclaimer

No Upload is a utility, not a service. It runs in your browser and does the work on your device.

No warranty

The tool comes with no warranty of any kind. It may produce a file that is larger than the source, that fails to play, or that a platform rejects. Check your output before you rely on it.

The container patch

The container patch rewrites parts of the MP4 container: timestamps, the file-type box, and a metadata tag. It does not add detail that was not in the source and it does not change how the video decodes. If a player or platform objects to the edited container, do not use the output.

Results depend on your device

Encoding speed and the largest file you can process are limited by your browser and how much memory your machine has. A phone will handle a shorter clip than a desktop with plenty of RAM.