Fix videos that won't open, won't seek, or won't stream. Upload the file — we repair it and hand back a clean, playable MP4.
Repairs common problems that stop a video from playing correctly: a broken or missing MP4/MOV header (moov atom), missing faststart, bad stream interleaving, wrong container metadata, and variable frame rate. The tool first tries a lossless remux; if the file needs more, it re-encodes to a clean MP4. The result is never more than 10% larger than your original, and usually smaller. Files that are too badly damaged (for example, a recording cut off before the header was written) may not be recoverable.