Multiple faces at once
Free local video processing. Review detected faces and plates, add manual regions and check the complete export. Speed and capacity depend on your device.
Face blur
Blur faces in video online, free
AutoBlur's AI detects and blurs faces in videos automatically to protect privacy and identity. Upload a clip, review the faces it found, and export — no masking, no keyframes, no watermark.
Multi-face tracking Runs in your browser No signup
Capabilities
Built for faces that move
A face detector on its own drops out the moment someone turns their head. Tracking is what makes the export usable.
Follows the subject
The AI tracks moving faces throughout the video, so the blur follows the person instead of requiring manual keyframes.
Blur, mosaic or solid
Review the whole exported video before sharing. Automatic detection can miss regions; use manual masks where needed.
Pick who gets blurred
Every tracked face is listed separately, so you can anonymise the crowd and keep your presenter sharp.
Manual top-up
If a difficult angle is missed, draw a box over it — manual regions are tracked exactly like detected faces.
Nothing leaves the tab
Files are processed locally in your browser and never uploaded or stored permanently on external servers.
How to blur a face
Three steps, about a minute
No timeline, no plugin, no account.
Upload your video
Drop in an MP4, MOV or WebM file. It opens straight in the browser — on a laptop or on your phone.
Let the AI find the faces
Detection runs over the clip and lists every face it found, each one tracked across the frames it appears in.
Choose a style and export
Tick the faces to cover, pick blur or mosaic, set the strength and download a clean file with no watermark.
Crowds
100+ faces in one pass
Events, markets, classrooms and station concourses all put more faces in frame than anyone would mask by hand.
- Simultaneous tracking — every face gets its own identity and its own toggle.
- Partial and angled faces — profiles and half-turned heads still register.
- Consistent strength — one setting applies across every tracked face.
- One export — all faces are rendered in a single pass, not one render per person.
Face #100:00 → 01:42blur
Face #200:03 → 00:31blur
Face #3 · presenter00:00 → 01:42keep
+ 104 more facestracked automaticallyblur
FAQ
Common questions
Does face blur work on a video with many people?
Free local video processing. Review detected faces and plates, add manual regions and check the complete export. Speed and capacity depend on your device.
Can the blur be removed from the export?
No. The blur is rendered into the pixels of the exported file rather than laid over it, so there is nothing to peel back.
Do I have to blur every face?
No. Each tracked face has its own toggle — blur the bystanders and leave your subject visible.
Is my video uploaded anywhere?
No. Files are processed locally in your browser and never uploaded or stored permanently on external servers.
What if a face is missed?
Draw a box over it. Manual regions are tracked the same way detected faces are, so a difficult angle stays covered as the shot moves.
Does it work on photos too?
Yes — the same detector runs on JPG, JPEG, PNG and other common image formats.