How to Blur Faces in a Video on iPhone (Auto-Tracking, Several Faces)

The honest answer first: the Photos app and iMovie on iPhone cannot blur a face in a video. Photos can trim, crop and adjust colour, but it has no blur. iMovie for iOS has no blur effect and no mask tool, so there is nothing to attach to a face. If you searched for how to blur a video on iPhone, you need another app. The real question is which kind: an editor where you draw a mask and move it by hand as the face moves (CapCut), or an app that finds the faces for you and keeps the blur on them while they move (BlurQ, Redact).

Disclosure: we make BlurQ. We cover CapCut and Redact fairly below, with their prices and limits, because for some clips they are the better choice. The goal is that you pick the right tool once and do not redo the work.

iPhone Video Blur Options at a Glance

Method 1: BlurQ (Automatic Tracking, Several Faces, On Device)

This is our app, so read the steps and judge for yourself. The BlurQ face blur app for iPhone is free to download and needs iOS 18 or later. It was built for one job: find the faces in a photo or video and keep them covered without you drawing anything. Everything runs on the phone. The video is never uploaded, which matters more for video than for photos because footage carries voices, places and other people.

Here is how to blur faces in a video on iPhone with BlurQ:

• Open BlurQ and pick a video from your library.
• Tap once to find the faces. BlurQ marks every face it finds in the clip, not just the first one.
• Play the preview. The blur stays on each person when they turn their head, walk across the frame or pass behind a hand. You do not add keyframes.
• Tap a face to turn its blur off or on. This is how you keep yourself clear and hide everyone else, or the other way round.
• Pick a style. Gaussian blur, Pixelate and Cover are free. Pro adds more styles, and emoji stickers that follow a face if you want a lighter look.
• Need the whole person hidden, or the background instead? Use People blur or Background blur for video.
• Something that is not a face, such as a license plate, a house number or a sign? Tap the object and BlurQ tracks it through the clip.
• Trim the tracked range on the timeline if the blur should only run for part of the video.
• Export. The finished video is saved to your Photos library.

The limits, stated plainly. Free video exports stop at 8 seconds and 720p. BlurQ Pro Lifetime is a $9.99 one-time purchase that removes the length limit and the watermark; there is no subscription. BlurQ is iPhone only, with no iPad or Android version. There is no batch mode for several videos at once, and exports keep the original resolution rather than upscaling. If your clip is a short story or reel, the free version is often enough; if it is a longer video, you will need Pro.

Method 2: CapCut on iPhone (Manual Mask and Keyframes)

CapCut is the answer most people get when they ask an AI assistant how to blur a face in a video on iPhone, and it does work. CapCut is a full video editor, so it can do many things BlurQ cannot, such as cuts, text and music. But it has no face detection on iPhone. You build the blur yourself from an overlay, an effect and a mask. These steps follow CapCut's own how-to guide:

• Open CapCut, tap New project and add your video.
• Select the clip and tap Copy to duplicate it. Move the copy to an overlay track above the original (Overlay > Add overlay works too).
• With the overlay selected, go to Effects > Video effects, search for Blur (or Mosaic) and apply it to the overlay only.
• Still on the overlay, tap Mask and choose Circle. Resize it to cover the face.
• Tap Invert if the blur appears everywhere except the face. The goal is a blurred circle on top of a sharp video.
• Scrub to the start, add a keyframe, then move forward and drag the mask to the new face position each time the person moves. Add a keyframe at every stop.
• Repeat steps 2 to 6 for each additional face. One mask is allowed per overlay, so every extra face needs its own overlay layer.
• Export at the resolution you need.

This is a fair workflow for one face in a short clip where the person does not move much. It gets slow when a face moves across the frame, because every change of direction needs another keyframe, and slower again with several faces, since each one is a separate overlay with its own keyframes. Desktop CapCut has a Track mask option that follows the subject for you; the iPhone app does not, so on the phone keyframes are the only way. If you already edit in CapCut and the clip is simple, stay there. If you are opening CapCut only to blur faces, an automatic tool will save time.

Method 3: Redact (Blur Faces in Video & Photo)

Redact is the strongest alternative to BlurQ for automatic work on iPhone, and it is worth knowing about. It detects faces and license plates automatically, tracks every face across the clip, and gives you a timeline per person so you can switch one individual's blur on or off for a range of frames. Processing runs on the device. Free video exports carry a Redact badge and a length limit; Redact Pro is $3.99 a month, $22.99 a year or $59.99 lifetime. Unlike BlurQ, it also runs on iPad and Mac, so if you want the same tool on a tablet or a laptop, Redact fits better.

Blur Video AI is another option in the same group: 4.7 stars from 949 ratings on the App Store, automatic detection of faces, plates and text, with exports behind in-app purchases.

iMovie and the Photos App: What They Can and Cannot Do

People keep searching for how to blur faces in iMovie because it is already on the phone. Here is the plain situation. iMovie for iPhone can trim, split, add titles, transitions, filters and music. It cannot blur a region of the frame, has no mask tool and no tracking. The old picture-in-picture trick that people use on the Mac (zoom a copy of the clip and place it over the face) does not blur anything, and iMovie on iOS cannot freely resize a picture-in-picture layer anyway.

The Photos app can trim a video, crop it, straighten it and adjust exposure and colour. It cannot blur anything, in photos or in video. The Markup tool in Photos works on photos only, and even there it draws shapes rather than blurring. So neither built-in app is an answer. If a tutorial says otherwise, it is usually describing the Mac version of iMovie or a photo, not a video.

Blur a License Plate or a Sign in a Video on iPhone

Faces are not the only thing that identifies people. Car plates, house numbers, name badges and street signs do it just as well, and none of them are faces, so face detection will not find them. In BlurQ, tap the object once and it is tracked through the clip the same way a face is; this works for a plate on a moving car as long as it stays in view. The same free and Pro rules apply: free exports up to 8 seconds at 720p, Pro Lifetime for longer clips. Redact detects license plates automatically and Blur Video AI detects plates and text. For the photo version of this problem, including why plates need a heavier blur than you might think, see how to blur a license plate in photos.

Which Blur Style Hides Identity in Video

A light Gaussian blur looks polite but hides little. In video it is worse than in a photo, because a viewer gets hundreds of frames and slightly different angles, and the brain fills in what the blur removed. Use Pixelate with large blocks or a solid Cover (a box or an emoji) for anyone who really must not be recognised. Keep the soft blur for backgrounds or for people who only need to be de-emphasised.

Then check the edges. Tracking can slip when a face leaves the frame and comes back, when two people cross, or when someone turns fully away and back. Scrub through the exported video frame by frame around those moments, especially the first and last frames where a face is visible. One clean frame is enough to defeat the whole effort, because anyone can pause the video or take a screenshot. If a face escapes, go back, re-check that face in the app and export again. This applies to every tool on this page, including ours.

Before Posting to TikTok, YouTube or Instagram

Do the blur on your phone before you upload. Once a video is on a platform, a copy exists outside your control, and anyone who saw it in the first minutes may have saved it. YouTube Studio has its own blur tool, and it is good, but it only works on a video that is already uploaded to your channel; you can keep it unlisted while you edit, yet the original is still on YouTube's servers. TikTok and Instagram have no face blur at all; stickers and effects can cover a face at one moment but do not follow it. So the order is: blur, check frame by frame, then upload.

Wrapping Up

On iPhone, blurring a face in a video comes down to one choice. If you want to draw and keyframe the blur yourself inside a full editor, CapCut does it, one face per overlay. If you want the faces found and tracked for you, BlurQ does it on the device for free up to 8 seconds, with a $9.99 one-time Pro Lifetime for longer clips, and Redact does it with a subscription or lifetime price and runs on iPad and Mac too. iMovie and Photos are not in the race.

For desktop tools, YouTube's own blur and the full comparison across platforms, read how to blur faces in videos. And if what you actually have is a photo rather than a video, you can blur faces online in your browser; that web tool is for photos only and does not process video.