How to blur faces in CapCut on desktop or iPhone

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

When that happens in CapCut, look at the two copies of the video. One is clear and one is blurred, with one sitting above the other. The mask decides which part of the upper copy you see. If it reveals the wrong part, you get a clear face surrounded by blur instead of the other way around.

Get that arrangement right on one frame first, then make the mask follow the child. The desktop and iPhone routes below use opposite layer arrangements, so follow one from start to finish. If desktop tracking isn't available in your version or plan, the manual cover method below gives you another route.

Before importing, decide whether CapCut should receive the original

CapCut's April 2026 privacy policy covers its mobile, desktop and web services. It says content may be sent to the service when you create or import it, before you save or publish, for features such as captions and recommendations. An unpublished project therefore isn't proof that the footage stayed on your device.

If you don't want CapCut to receive uncovered faces, cover them in a tool that processes locally, such as ours, then import the checked export for further editing. If you already imported the original, a later blur cannot establish what was previously sent or retained. Use the policy's Contact Us route to ask about that content; its retention section does not give every imported file a fixed deletion date.

On desktop: put the blurred video above the clear one

On CapCut for Mac or Windows, use the clear original underneath and a blurred copy above it. A circular mask limits that upper copy to a patch over the face:

CapCut's desktop walkthrough creates the blurred copy with an extra export:

1. Import your video, put it on the timeline and apply Effects → Blur. Extend the effect over the whole clip and export that fully blurred version.
2. Remove the purple blur-effect bar from the timeline so the original is clear again. Import the blurred file and put it on the track above the original. Match their starts and ends.
3. Select the upper blurred clip. Open Mask, choose a circle and position it over the face. Leave inversion off and resize the patch to include the whole face.
4. If you have Track mask → Track, use it and play through the result.

Give the intermediate file a name such as birthday-blurred-layer.mp4, so you can distinguish it from the final video. It should be blurry everywhere; the face-only result comes after you place its mask over the clear original.

If the face is still sharp, confirm that the blurred file is on top and inversion is off. If the entire picture is blurred, check that the upper layer's mask is active. Once that frame looks right, move on to the tracking.

On iPhone: blur underneath, clear overlay above

This route starts with blur on the lower copy, then uses a clear upper copy with a hole over the face:

1. Create a New project, select the video and add blur through Effects → Video effects.
2. Choose Overlay, add the same video again and match its size and timing to the first copy.
3. Select the clear overlay, open Mask, choose a circle and tap Invert. Move and resize the opening over the whole face.

The clear overlay now supplies the surroundings, while the opening shows the blur underneath. That's why Invert is on here and off in the desktop route. CapCut's iPhone walkthrough shows this arrangement.

Move the iPhone mask by hand

At the start of the masked section, select the overlay and add a Keyframe with the mask positioned over the face. A keyframe saves its settings at that time. Move ahead until the face changes position, add another keyframe and move or resize the mask to fit. CapCut documents mask position, size and rotation in its mobile masking example.

For a head turn, place corrections before the turn, during it and after it. Then drag slowly through the time between them. If the child dips below the mask, pause at that dip and add another correction. The mask moves between the positions you give it, so it needs enough positions to follow the child's actual route.

If desktop tracking is missing, use a cover you can move

Import a plain solid-color image and put it on a track above the video. Resize it to cover the face with some room around it, leave opacity at 100 and extend its duration through the whole time the face is visible.

Select that image clip. In the right-hand Video / Transform controls, click the diamond beside Position at the first covered frame. Move ahead and change Position to keep the image over the face. Use Scale keyframes as well when the child comes closer. CapCut's desktop keyframe guide shows these controls.

If you don't see the diamond, check that the image clip is selected and expand the editing panel. A regular imported image avoids the template elements that CapCut lists as unsupported in its missing-keyframe help.

Move the solid image with these controls. Moving the whole blurred video layer to chase the face would shift the scene inside the patch, putting it out of alignment with the clear copy underneath.

Keep the two copies together

With either blur method, both copies need to show the same moment at the same size. If one starts later, the patch can contain a face from a different instant. A speed change or trim applied to only one copy can cause that too.

After changing the cut or speed, replay the whole masked section. Checking the beginning alone won't catch two copies that gradually get out of step.

Check between the keyframes

Play the clip, then move slowly through quick turns, ducks, entrances and exits. Check the first frame after someone moves out of the way. Whether a tracker placed the mask or you placed it yourself, this is where you'll find a cover that arrived late or took a different path.

Pause at a miss, add or adjust the mask's position there, and play from before that correction until after it. Keep the face away from the mask's feathered edge, where the treatment blends into the clear picture.

If blur still leaves more detail than you want, use the solid-image method above or crop the face out. The blur, mosaic and cover comparison explains what remains in each method. You can also shorten the public clip to leave out a difficult stretch.

Finish by watching the saved video

Export the final masked edit under a different name from the original and the fully blurred intermediate file. Open that saved video from your files or photo library, check its duration and play it all the way through. Pause at the turns and entrances you worked on, then check the cover image you've chosen for the post.

Listen for names, check the location information, and read the caption for a school or class location you meant to keep private.

If a relative has the original too, send them the finished copy and agree that this is the one to post. The family sharing guide has wording for that conversation. Your edit won't change the file already on their phone.