100% local processing
Keep the media stream.
Patch the container.
VideoPatch rewrites MP4 container structures in your browser without re-encoding the video or uploading it to a server.
Drop an MP4 here
H.264 or HEVC video with AAC audio
✓Video samples are copied byte-for-byte
✓Audio samples are copied byte-for-byte
✓Only MP4 structure and compatibility metadata are rebuilt
Building patched MP4…The file stays on this device.
Patch failed
Advanced details
PRIVATE BY DESIGN
No upload endpoint exists.
The selected file is processed inside your browser. There’s no account, cloud storage, queue, subscription, or daily limit.
EXPERIMENTAL
Built from real MP4 comparisons.
The default pipeline uses FFmpeg.wasm stream-copy, then applies experimental RTX headers and compatibility packets. The original encoded samples stay unchanged. TikTok behavior remains unverified for this version.