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GuideOctober 12, 2026 | 6 min read

How to blur faces in iMovie

TL;DR: Apple's iMovie guides describe no way to blur or pixelate one part of the frame, and iMovie doesn't track faces. The standard workaround is a cover image placed over the face as a picture-in-picture overlay. On a Mac you can keyframe its position to follow someone who moves. On iPhone, the overlay stays where you drop it. It costs nothing and works for one person who doesn't move much. For a real blur that follows faces, use DataBlur's free blur-video tool in your browser, then finish the edit in iMovie.

So you went looking for how to blur faces in iMovie and opened every menu twice. The effect you're after isn't there. iMovie is made for quick, good-looking home movies, and censoring faces was never part of the plan. When someone asked about blurring in the Apple Support Community, the reply was blunt: no blurring effect as such, try a different app.

There is one workaround that holds up, though. Here's how it goes on Mac and on iPhone, and what to do when the clip has more than one face.

How to blur a face in iMovie on Mac

You can't blur, so you cover. The tool for that is the picture-in-picture overlay, which puts a clip or image in a small window on top of another clip. Apple's guide to picture-in-picture in iMovie on Mac documents every control used below.

Start with a cover image. Any small solid square or circle saved as a PNG or JPEG will do. Black is the usual pick, though an emoji or your logo works if it suits the tone of the video. Make it in whatever image editor you like.

Then, in iMovie:

  1. Import the cover image into your project
  2. Move the playhead to where the face first appears. Drag the image from the browser to the spot above that clip in the timeline and let go when the green Add icon (+) shows up
  3. If the overlay controls aren't visible, click the Video Overlay Settings button. Choose Picture in Picture from the pop-up menu on the left
  4. In the viewer, drag the picture-in-picture window over the face and pull its corners until the face is fully covered
  5. In the timeline, drag the ends of the overlay so it lasts exactly as long as the face is visible
  6. Click the Apply button in the picture-in-picture controls

If the person moves

On a Mac, iMovie can animate the position of a picture-in-picture clip with keyframes:

  1. Select the overlay in the timeline and open Video Overlay Settings
  2. Park the playhead where the face is, then click the Add Keyframe button in the viewer
  3. Move the playhead later and drag the overlay to the face's new spot. Keep adding keyframes until the movement is covered
  4. Click Apply and play it back

iMovie glides the cover from one keyframe to the next. Slow, steady movement takes a few keyframes. Someone pacing and waving their hands takes a lot.

How to blur a face in iMovie on iPhone

The iPhone and iPad app has picture-in-picture as well, but Apple's guide to video overlay effects on iPhone doesn't mention keyframes for it. So on a phone this only works for a face that stays put:

  1. Move the playhead to where the face appears
  2. Tap Add Media and choose your cover image
  3. Tap More and choose Picture in Picture
  4. Select the overlay, tap the Position Control button, then drag it over the face and pinch to resize
  5. Trim the overlay in the timeline so it lasts as long as the face is on screen

Watch for one quirk: iMovie on iPhone adds a Ken Burns zoom to photos you put in a project. If the cover starts creeping across the frame, look for the Ken Burns setting on that image and turn it off.

For someone moving on iPhone, split the shot into short sections with a separate overlay for each, or switch tools.

And sometimes the cleanest answer is no cover at all. If the person sits near the edge of the frame, cropping them out can look tidier than a black box.

Where the iMovie method breaks down

  • You get a cover, not a blur. A box or a sticker sits where you'd expect the soft blur or pixelation of news-style anonymization. Fine for privacy, different look
  • Nothing tracks. Every bit of movement is a keyframe you place by hand, and that's on Mac only
  • Only the position animates. Apple describes animating the overlay's position. If someone walks toward the camera and their face grows, size the cover for the largest moment from the start
  • Overlays pile up. Three or four people in one shot means several overlays over the same stretch, each with its own keyframes. That gets hard to manage quickly
  • Frames slip through. With manual keyframes, a fast head turn between two of them can expose the face for an instant

For one mostly still person, the overlay route is quick and free. Past that, the hours stack up.

When keyframing gets old: track the faces automatically

DataBlur's blur-video handles what iMovie leaves out. It runs in recent Safari, Chrome or Edge, on clips up to 3 minutes:

  • It tracks the faces as they move through the clip
  • You untick anyone who should stay visible
  • You download an MP4 with the original audio, ready to drop into iMovie

There's no upload. Your Mac or iPhone does the processing, right in the browser. No account, no watermark, no cost.

It does have blind spots. Faces in profile or mostly hidden behind something can be missed, so watch the result before you share it. And it only handles faces. For a single photo, blur-face does the job for images. If your video is a screen recording rather than camera footage, see our guide to blurring a screen recording.

iMovie vs DataBlur blur-video

  • Finds faces automatically. iMovie: No. DataBlur blur-video: Yes, faces are tracked for you.
  • Follows movement. iMovie: Manual position keyframes on Mac. None on iPhone. DataBlur blur-video: Yes, each face tracked.
  • Blur or pixelate. iMovie: Not described in Apple's guides. Cover image only. DataBlur blur-video: Blurs faces.
  • Cost. iMovie: Free. DataBlur blur-video: Free.
  • Upload. iMovie: No. DataBlur blur-video: No, runs in the browser.
  • Watermark. iMovie: None documented by Apple. DataBlur blur-video: None.
  • 1-minute clip, 3 people. iMovie: Three overlays, each keyframed by hand on Mac. Hard on iPhone if anyone moves. DataBlur blur-video: One pass, untick who stays visible, then review.

Before you publish

  • Play the whole movie full screen and follow each covered face from start to finish
  • Pause just before and just after every overlay begins and ends
  • Step through any fast movement between keyframes
  • Check mirrors, windows and screens in the background for extra faces
  • Make sure names, school logos or house numbers don't identify the people you covered
  • Watch the exported file once before you share it

FAQ

Can you blur a face in iMovie?

Not with a blur effect. Apple's iMovie guides don't describe a way to blur or pixelate part of the frame. The usual workaround is to cover the face with an image as a picture-in-picture overlay. For a true blur, use a separate tool like DataBlur's blur-video and import the result.

Can iMovie track a moving face?

No. On a Mac you can animate a picture-in-picture overlay with position keyframes that you set by hand. On iPhone, Apple's guide shows no way to animate the overlay, so it stays where you put it.

How do I blur a face in iMovie on iPhone?

Add a cover image as a picture-in-picture overlay, then position and resize it over the face. It won't follow the person. For moving faces, blur the clip with DataBlur's blur-video in Safari first, then edit it in iMovie.

Is there a free face blur app for iMovie users?

DataBlur's blur-video is free and runs in the browser, including recent Safari on Mac and iPhone. It tracks and blurs faces, and you import the MP4 into iMovie afterward.

Does iMovie add a watermark?

Apple's documentation doesn't mention one, and iMovie itself is free from Apple.