Blur faces in any video — free
Free, automatic face blur that runs entirely in your browser. No upload, no sign-up and no watermark — SmartBlur finds and blurs every face, even in crowded, fast-moving footage.
See before & after examplesHow to blur faces in a video
- Drop in your video. MP4, MOV or WebM, any length. It loads straight into your browser — nothing is uploaded.
- Faces are blurred automatically. SmartBlur detects and tracks every face frame by frame, even fast-moving faces and crowds.
- Download your blurred video. Exported as an MP4 in the original quality — free, and with no watermark.
Why SmartBlur
- 100% private. All processing runs locally on your device, so your video never leaves your browser. That makes it GDPR compliant by design.
- Completely free. No sign-up, no credits, no time limit and no watermark.
- Automatic & accurate. Blur multiple faces at once, choose pixelated or smooth gaussian blur, adjust the mask, and keep your original audio.
Supported formats & browsers
Import MP4, MOV or WebM and export an MP4 at the original quality. SmartBlur works in the latest Chrome, Edge, Safari 26+ and Firefox on desktop.
Frequently asked questions
Is SmartBlur free?
Yes. SmartBlur is completely free to use — no sign-up, no credits, no time limit, and no watermark on your blurred video.
Do you upload my video?
No. Your video is never uploaded. SmartBlur runs 100% in your browser, so your footage never leaves your device.
Does it blur faces automatically?
Yes. SmartBlur detects and blurs faces automatically, frame by frame — including multiple faces and fast-moving faces in crowded scenes.
What video formats are supported?
You can import MP4, MOV, or WebM videos of any length. SmartBlur exports an MP4 in the original quality, with no frames dropped.
Is SmartBlur GDPR compliant?
Yes. Because nothing is uploaded or stored on a server and all processing happens locally on your device, there is no personal data to share.
Will the blurred video have a watermark?
No. There is no watermark and no quality loss — you get a clean MP4 at the original resolution.
Which browsers does SmartBlur work in?
It works in the latest Chrome, Edge, Safari 26+, and Firefox on desktop, which support the in-browser video and GPU APIs it relies on.
Can I blur faces without an internet connection?
After your first visit the on-device model is cached, so blurring runs locally without sending anything to a server.