How to blur faces in a photo on iPhone
You want to post the picture, not the people in it. Here is every practical way to cover a face on an iPhone, what each one misses, and how to check the result before you share it.
The short answer
iOS has no built-in blur tool for photos. The Markup editor inside the Photos app can only draw shapes and scribbles on top, which works but looks crude and is easy to undo by accident. For a proper blur you need an editor that can replace the pixels — and for more than one or two faces, one that can find the faces for you.
Option 1: Markup, the built-in workaround
- Open the photo in Photos and tap Edit.
- Tap the Markup icon (the pen tip), then + and choose a shape.
- Drag the shape over the face and set its fill to an opaque colour.
- Tap Done to save.
What it gets right: it is free, offline and already on your phone.
Where it falls down: a solid black box looks like a redaction, not a photo. It cannot blur or pixelate, it cannot follow the shape of a head, and covering six faces at a party means dragging six rectangles by hand. It also edits the photo in place, so you are relying on "Revert" to get your original back.
Option 2: A blur brush
The most flexible method is to paint the blur on yourself. You pick a brush size, drag over the face, and the pixels underneath are genuinely softened rather than covered with a sticker. Good brush tools give you three things worth insisting on:
- Adjustable strength — a weak blur on a small face can still leave it recognisable.
- An eraser — so an accidental stroke across someone's shoulder can be taken back without starting over.
- Zoom while painting — faces in the background of a photo are small, and you cannot be precise at fit-to-screen size.
In Blur Photo this is the Blur tool: drag one finger to paint, two fingers to pan, pinch to zoom. Undo and redo cover every stroke.
Option 3: Automatic face detection
For group photos, detection saves real time. Apple's Vision framework — the same on-device technology that powers face recognition in the Photos app — can locate every face in an image in a fraction of a second, without sending anything to a server.
In Blur Photo the Face tool runs that detection and then, crucially, shows you what it found by outlining each face before anything is applied. That preview matters: it is the difference between "I blurred the faces" and "I hope I blurred the faces". Tap any outline to include or exclude that person, choose blur or pixelate, and adjust the strength.
When detection misses someone
No face detector is perfect. Profiles, faces turned away, small faces far in the background, heavy shadow, motion blur and sunglasses all reduce the hit rate. That is exactly why an automatic tool should never be the only tool: switch to the brush and cover the missed face by hand. Blur Photo lets you paint straight onto the same layer, so automatic and manual work combine in one edit.
Option 4: Pixelate instead
Blocks read as a deliberate editorial choice, which is often what you want for a screenshot or a news-style image. Pixelation is covered in detail in the pixelate guide — including the block size mistake that can leak the very thing you were hiding.
Before you share it: three checks
- Zoom into the exported copy. A blur that looks solid at thumbnail size can be far weaker at full resolution. Open the saved file and pinch in on each covered face.
- Look for the second photo. Reflections in windows, mirrors, sunglasses and screens can show a face you thought you had covered.
- Check the metadata. A blurred face is little help if the file still carries the GPS coordinates of the house it was taken in. Blur Photo strips location data from exports by default.
Does blurring actually protect someone?
When pixels are replaced, the original detail is gone from that file — it cannot be "unblurred" back into existence, whatever films suggest. The real risks are different ones: a blur that is too light to obscure features, a face that appears unblurred elsewhere in the same image, or context that identifies the person anyway. Judge the exported picture as a whole, not just the blurred patch.
Blur Photo is coming soon to the App Store.
Blur faces, backgrounds and private details on your iPhone — nothing leaves your device.
Questions people ask
Can you unblur a blurred photo?
Not meaningfully. Blurring replaces the pixels in the exported file, so the original detail is not stored anywhere in it. Software that claims to “unblur” an image is inventing plausible detail, not recovering the real thing. The genuine risks are a blur that was too weak to begin with, or the same face appearing unblurred elsewhere in the picture.
How do I blur a face in a photo on iPhone for free?
The Markup tool in the Photos app can cover a face with an opaque shape at no cost, though it cannot blur. Blur Photo's manual blur and pixelate brushes are free too, and they replace the pixels properly; automatic face detection is a Premium feature.
How do I blur several faces at once?
Use a tool with automatic face detection. Blur Photo's Face tool finds every face Vision can detect, outlines them so you can check the result, and applies the effect to all selected faces in one step. Any face it misses can be covered with the brush.
Does blurring change my original photo?
It should not. Blur Photo never writes to your source photo — exporting always creates a new image and leaves the original in your library untouched. Editing in the Photos app's own editor does modify the photo in place, though you can use Revert to undo it.
Is it legal to post photos of other people?
That depends on where you are, where the photo was taken and how it will be used. Many countries treat publishing an identifiable person's image without consent as a privacy matter, and rules are stricter for children. Blurring faces is a reasonable precaution, but it is not legal advice.