How to Blur All Faces in a Video Automatically

Here's the short version: you don't need to blur faces one by one. Load your clip into an app with on-device face detection, tap Blur All Faces, and the AI finds and covers every face in the video for you. In TrackBlur it really is one tap — it works entirely offline on iPhone and Android, and your export has no watermark.

Now the longer version, because this problem is more common than it sounds.

Why you'd want every face blurred

Film anything in public and you'll catch people who never agreed to be in your video. A vlog on a busy street, your kid's school play, a football match, dashcam footage — there are strangers (and often other people's children) in all of them.

You could pause on every frame and mask each face by hand. Nobody actually does that. It takes forever, and you'll still miss the person who wanders through the background at second 14.

That's the whole point of Blur All Faces mode: the app scans the video, finds every face — including people who walk in and out of the shot — and keeps them covered as they move.

See it in action

The whole thing, start to finish, in under a minute:

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The steps

1. Import your video into TrackBlur.
2. Pick Blur All Faces from the main menu.
3. Let it scan. The on-device AI goes through the timeline and finds every face.
4. Style the mask. Classic blur, pixelation, or a solid color box — your choice. You can also raise the intensity and add padding around each face, so fast movement never shows an edge.
5. Export. The finished video lands in your photo library in full quality, with no watermark. Post it wherever you like.

By the way — if you only want to hide some people, not everyone, that's a different mode. See how to blur only certain faces.

One thing worth knowing: it all happens on your phone

Most face-blurring tools are websites. You upload your video, their server processes it, you download the result. Which means the unedited footage — the version with your kids' faces clearly visible — just landed on someone else's computer.

TrackBlur skips that entirely. The AI runs on your phone, so the video never leaves it. It even works in airplane mode.

Try it

The Blur All Faces tutorial walks through every option in detail — or just grab the app and try it on a real video, which is honestly faster.

More guides like this:

• How to blur only certain faces in a video — keep your main subject clear, hide everyone else.
• How to blur a moving object in a video — for license plates, logos, and anything that isn't a face (there's also a full Motion Tracking tutorial).