Video
Strip metadata from a video without re-encoding it
Video files carry the same kinds of hidden data as photos: the device, the software, the creation date, GPS on some phones, and provenance records on clips from AI models. Most online tools are image-only, and the ones that do handle video usually re-encode it, which costs you quality and time. This one does not.
Nothing is re-encoded
Cleaning a video here rewrites only the metadata boxes. The picture and sound are copied through untouched, bit for bit, so there is no generational quality loss and no waiting for an export. A three gigabyte file cleans in about the time it takes to read it.
The reason it is safe is worth knowing. MP4 sample tables store absolute file
offsets into the media data. Delete a metadata box and every one of those offsets
shifts, and you get a file that no longer plays. So nothing is deleted: each unwanted box
is overwritten in place with padding of exactly the same size, free in
MP4 and MOV, Void in WebM and MKV. The file keeps its exact byte length,
every offset stays valid, and players skip padding by specification.
Formats
MP4, MOV, M4V, 3GP, WebM, MKV and M4A. AVI, WMV, FLV and MPEG-TS have no parser here and are refused with a clear message rather than written back damaged.
What comes out
- C2PA and Content Credentials manifests
- XMP packets
- Generator and encoder tags, the
udta,metaandilstboxes - WebM
Tags,WritingAppandMuxingApp - Creation dates, device names and chapter data, unless you tick Keep ordinary file details
What stays, and this is the part to read
A visible logo stays. Metadata cleaning does not touch pixels. There is an opt-in eraser for a logo sitting still in one corner, the kind Runway, Kling, Luma and Pika use, and that one does re-encode. A mark that moves, like Sora's, cannot be covered by a fixed rectangle at all; that needs per-frame tracking and is not built here.
SynthID stays. Google Veo spreads its watermark across frames and into the audio, engineered to survive re-encoding and compression. There is no public way to detect or remove it, so nothing here claims to. The full explanation is here.
So a cleaned clip is not a mark-free clip. The provenance record is gone; anything carried in the picture or the sound is exactly where it was. If a tool tells you otherwise about a Veo clip, it is wrong.
Common questions
Does cleaning a video reduce its quality?
No. Only the metadata boxes are rewritten. The picture and sound are copied through bit for bit, so there is no generational loss and no export wait.
How is the metadata removed without breaking the file?
MP4 sample tables store absolute file offsets, so deleting a box would shift them all and break playback. Instead each unwanted box is overwritten in place with padding of exactly the same size, so the file keeps its byte length and every offset stays valid.
Can it remove a watermark from a video?
No. Metadata cleaning does not touch pixels. There is an opt-in eraser for a logo that sits still in one corner, but a moving mark cannot be covered by a fixed rectangle, and SynthID cannot be removed at all.