Remove Metadata from WebM — Free, No Upload
WebM is the web-native variant of Matroska — same tag system, same container, restricted to VP8/VP9/AV1 video and Vorbis/Opus audio. Browser-recorded clips (MediaRecorder API), Chrome screen captures, and most Sora/Runway exports use WebM. Cleaning works identically to MKV.
Last reviewed 2026-04-28 · Verified against synthetic + real-world WebM samples
Drop your .webm file
Tamaño máximo: ~2 GB (según memoria)
What leaks in WebM files
- Browser/recording-app identifier in MuxingApp (Chrome, Firefox, ffmpeg.wasm, OBS)
- Title and Description Matroska tags
- TrackUIDs (deterministic per recording session — can fingerprint a specific Chrome instance)
- Encoder strings naming the VP9 / Opus version
Frequently asked questions
How do I strip metadata from a WebM video?
Drop the .webm in. Same Matroska tag-emptying pipeline as MKV. Output stays WebM.
Does it work on browser-recorded MediaRecorder output?
Yes. Browser-MediaRecorder WebM clips carry a MuxingApp string identifying the browser and OS — we remove that. TrackUIDs are zeroed.
What if my AI-generated video is in WebM?
Some Sora and Runway exports come as WebM with C2PA payload embedded as a Matroska tag rather than an MP4 UUID atom. Our pipeline handles both — Matroska tag clearing is per-element.