Blur Faces in a Video for Privacy — Free, No Upload
Sharing a video that captures bystanders, kids, or sensitive screens? This guide blurs specific regions frame by frame — without sending the footage to any server.
Step-by-step
Strip metadata first
Run the file through the Metadata Cleaner to remove GPS, device model, and creation timestamps. Visual blur alone leaves location data leaking.
Mark regions to blur
Open Face Blur, draw rectangles over faces, screens, or plates. The tool tracks slow-moving subjects automatically.
Choose blur strength
Medium-strong Gaussian blur is irreversible for typical resolutions. Avoid pixelation — it can be partially reversed.
Recommended settings
| Blur type | Gaussian (irreversible at strength ≥ 30) |
|---|---|
| Tracking | Manual region per scene; auto-extrapolation between keyframes |
| Use cases | Newsroom, doxxing prevention, GDPR compliance |
Quality check before publishing
- Play the first and last three seconds to catch bad trims, black frames, missing audio, or a visible jump at the end.
- Confirm the exported file matches the important settings above, especially duration, aspect ratio, resolution, codec, and file size.
- Preview once on the target platform or device before deleting the original source file.
- If the clip will be reposted publicly, strip metadata first and verify no private names, GPS data, or device fingerprints remain.
Tools you may also need
FAQ
Why not pixelate?
Pixelation can sometimes be partially reversed by AI super-resolution. Gaussian blur at strength ≥ 30 is much harder to invert.
Will the blur survive social media re-encoding?
Yes — the blur is baked into the pixels before export. Subsequent compression preserves the blurred result.
Does this run in my browser?
Yes — every step in this guide uses an in-browser FFmpeg WebAssembly tool. Your video never uploads to a server and never leaves your device.