Repair Video
Fix videos that will not play or seek by rebuilding the container and index, or re-encoding readable frames.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Repair Video works
Video work runs in ffmpeg.wasm, the FFmpeg toolkit compiled to WebAssembly (GPL build, loaded as a separate engine file of about 30 MB the first time, then cached).
Input: MP4, MOV, WEBM, MKV, AVI, TS. Output: MP4, MOV, MKV, WEBM.
How to use Repair Video
- Drop a video onto Repair Video.
- The first run downloads the ffmpeg engine (about 30 MB, once).
- Set your range, format or quality options.
- Process it (progress is shown live), then download.
Tips
- Shorter clips and lower resolutions process much faster.
- Processing speed depends on your CPU; plug in laptops for long jobs.
- Keep the tab in the foreground while encoding.
Repair Video FAQ
- Can it fix a video cut off when the phone died?
- Only partly. Without the index the file needs the original camera settings to rebuild, which is not possible in the browser.
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
Related tools
- Video Converter: Convert between MP4, WEBM, MOV, MKV and AVI.
- Media Info: See codecs, bitrate, resolution, frame rate, HDR, channels, chapters and tags of any video or audio file.
- Repair GIF: Recover cut-off or damaged GIFs by keeping every frame that can still be read and writing a clean file.
- Video Trimmer: Trim and cut clips with a visual timeline, no re-upload.