How to blur faces in CapCut on desktop or iPhone

The whole video is blurry. You add a mask to fix that, and now the face is the only sharp thing in the picture.

If you've ended up there in CapCut, it helps to stop thinking about the blur button for a moment and look at the two copies of your clip. One is clear. One is blurred. Each copy sits on a layer, so one picture can appear over the other. The mask is the shape that decides which part of that layer you see.

Once that makes sense, the rest of the edit is easier to reason through. You want the clear picture around the face, the blurred picture over it, and both copies showing the same moment. Then you need the covered area to follow the child.

CapCut's official face-blurring guide describes desktop and iPhone methods. It doesn't name a tested app version, and controls can differ between installations. These steps follow that documentation; we haven't independently tested each version of CapCut.

On desktop: make a blurred copy and mask it

The desktop method in CapCut's guide works like this:

1. Duplicate the video so you have two copies.
2. Add a blur effect to one copy.
3. Make the treated clip a compound clip. This bundles the video and its blur into one item you can work on.
4. Add a shaped mask to limit where that blurred copy is visible.
5. Position the mask over the face. The guide points to Track mask, which tries to move the mask with the face as the clip plays.

Before tracking anything, look at the picture. Is the face obscured while the rest stays clear? If so, you've got the arrangement you need. If not, check which copy has the blur and which area the mask is showing.

I'd do this on one short section first. It's much less frustrating to fix the layer order before you've animated a whole video.

On iPhone: blur underneath, clear overlay above

CapCut describes a different arrangement for iPhone:

1. Apply blur to the original clip.
2. Add the same video as an Overlay, a second copy placed above the blurred one.
3. Choose a circular mask on that overlay and invert it. Inverting switches which part of the overlay is visible.
4. Position the resulting blurred area over the face.
5. Use keyframes to move the mask as the face moves. These mark where the mask should be at particular moments; check the movement between them too.

The inversion is what often causes confusion. Here, you're using the clear overlay to show the surrounding scene, while the opening over the face lets you see the blurred clip underneath. If the face is sharp and everything around it is blurred, revisit the inversion and layer order.

Both methods are in CapCut's walkthrough. Use the section for your device rather than trying to combine two different sets of buttons into one edit.

Keep the two copies together

Both clips need to start at the same moment and show the picture at the same size. Otherwise, a moving patch can show a slightly different moment or a differently sized image. The mask may be following the face perfectly, but the picture underneath it is wrong.

Trims and speed changes can disturb that arrangement too. If you make those changes after setting up the face treatment, go back and check the whole masked section. It's easy to remember the new cut and forget the second copy.

Check between the keyframes

Getting the mask right at two keyframes doesn't guarantee it covered the face between them. The child might duck and come back up while the mask takes a perfectly smooth route across the gap.

So drag slowly through the video between those marked moments, watching the face as you go. If the child ducks out of the covered area, that short section needs closer attention. Adjust the mask's position and size for the movement, then check the frames before and after the change. The two copies should still show the same moment, and the face should stay inside the treated area. If your version offers automatic tracking, inspect it in the same way.

I'd keep the decision about the shot open throughout this. A shorter clip, a crop that leaves the face out or a solid cover you can't see through can be a more sensible choice than trying to coax a weak blur through complicated movement. Our blur, pixelation and solid-cover comparison explains what each option leaves visible.

Finish by watching the saved video

Export the finished edit to save a new video, then open that copy from your files or photo library. Watch the whole thing, then pause as the child enters, turns and leaves. Check for other faces, and look at the cover image you've chosen for the post.

Listen to the audio and read the caption too. A full name and regular class location still reveal something, even when the face is covered. The location and metadata guide gives you a few more concrete things to check.

If somebody else has the uncovered version, agree on which copy they can share. The family sharing guide has wording you can use before they upload it. Editing your copy doesn't change the file sitting on their phone.