Repair a Broken Video
Rebuild a video whose container was damaged by an interrupted recording.
- Add
- Adjust
- Make
- Keep
How to use this tool
- Add your files — drag them onto the page or choose them. They stay on your device.
- Add the broken file — a download that stopped, a recording with a crushed index, a file a player refuses.
- Pick what to rebuild it as: MP4 for playback, MKV when you want the most tolerant container.
- Press “Repair” and download the results, individually or as one ZIP.
About this tool
Rebuild a video whose container was damaged by an interrupted recording. Free and unlimited, and nothing is uploaded: it all runs in your own browser. Everything is analysed and produced on your own device — nothing is uploaded anywhere, and you can verify it: the tools keep working even offline.
Privacy & limitations
Repair is a remux-and-recover pass: it re-indexes what is actually in the file and rewrites a clean container. It cannot recover frames the camera never wrote to storage, and a truly truncated tail stays truncated.
Last updated:
Frequently asked questions
Why will my video not play?
Most often the container index is missing. It is written when a recording is closed properly, so an interrupted recording leaves the frames present but nothing describing where they are. Rebuilding that index fixes it.
Can any broken video be repaired?
No. If the frames themselves are missing or overwritten there is nothing to recover. This fixes damaged structure, not missing data, and it will say plainly when it cannot.
Will repairing lose quality?
The first attempt copies the streams untouched, so nothing is lost. Only if that fails does it re-encode, which costs a little but recovers files the copy could not.
My video plays but cannot be seeked. Is that the same problem?
Yes, a milder version. Browser screen recordings often have no duration in the header, so players show zero seconds and refuse to scrub. Rebuilding the container fixes the seeking.