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How to blur a face in a video online free

Hide a face in a short clip before you post. Timed blur box in the browser, no account, nothing uploaded.

A person holding a smartphone with a video on screen
Photo from Unsplash

You filmed a friend, a customer, or yourself and need to post the clip without showing one face. Automatic face tracking in free apps often means upload, watermark, or account. A short manual box on a timeline in the browser avoids all three.

Blur a face in a video online free

  1. Upload the clip on the Video tab at BlurThis.
  2. Trim to the seconds you will share (max 90s export).
  3. At the first frame the face is visible, press Blur In and drag the box over the face.
  4. Scrub to the last frame you need covered and press Blur Out.
  5. Download and post the export, not the camera roll original.

If the person moves in the frame

Add a second blur segment: new Blur In / Blur Out pair when the face enters a different area. For a walking shot, a slightly oversized oval box reduces how often you must re-place. This is manual, not AI tracking, but it finishes in minutes on a thirty-second reel.

Oval vs rectangle on faces

Oval boxes match head shape and waste less blur on the background. Rectangle is fine for a tight talking-head crop. Increase strength if earrings or hair still read at full zoom.

Full walkthrough: how to blur part of a video online. For still photos, pixelate faces in a picture covers the image path.