What is the best app to blur faces in photos automatically?

For iPhone, Blur ID is built specifically for this: its on-device AI detects and blurs every face, avatar and piece of sensitive text in one tap, works offline, and is free to try. Signal's built-in blur tool is a good free alternative if you already use Signal.

Is there a free app to blur faces?

Yes. Blur ID is free to download and use (exports carry a small watermark on the free tier). Signal's face blur is completely free inside the messenger, and Apple's Markup can cover faces with solid shapes at no cost.

Do face blur apps upload my photos?

Some do — especially web-based tools that process images on a server. Blur ID processes everything on your iPhone and works fully offline; your photos never leave the device.

Can these apps blur faces in videos?

Blur ID currently focuses on photos and screenshots; video support is on its roadmap. For video today you'd need a video editor with manual blur tracking, which is considerably more work.

Best App to Blur Faces in Photos: 5 Options Compared (2026)

If you share screenshots or group photos, you need a way to hide faces fast — without uploading the image to some server. Here's an honest comparison of the five realistic options in 2026, including what each one can't do.

Quick comparison

Tool	Auto face detection	Blurs text & usernames	Offline	Price
Blur ID (iOS)	Yes — all faces in one tap	Yes, automatic	Yes, 100% on-device	Free with watermark; $0.99/mo, $4.99/yr or $7.99 lifetime
Signal (iOS/Android)	Yes — within the messenger	No — faces only, manual for the rest	Yes	Free
Apple Markup (iOS)	No — draw by hand	Manual solid cover only	Yes	Free
Apple Clean Up (iOS 18.1+)	Removes people, doesn't blur	No	Partially (on-device models)	Free on supported iPhones
Online blur websites	Varies	Varies	Often no — may upload	Free

1. Blur ID — best for automatic, private blurring

Blur ID is a dedicated app to blur faces in photos on iPhone. Import an image and its AI immediately finds every face — including the small profile avatars in chat screenshots that manual editing tends to miss — plus usernames and sensitive text, and blurs them all at once. You can tap to un-blur specific faces, switch to pixelation or emoji covers, and export a clean copy.

Two things set it apart. First, detection covers text and avatars, not just faces, which matters for screenshots. Second, everything runs on-device: no upload, no account, works in airplane mode. It's free to try (watermarked exports); premium starts at $0.99/month with a $7.99 lifetime option. iOS 17+ only — there's no Android version, which is its main limitation.

2. Signal — best free option if you already use it

The Signal messenger has a built-in blur tool in its photo editor: it auto-detects faces and lets you blur additional areas by hand, then you can save or send the result. It's free and processes on-device. The catches: you're working inside a messaging app rather than a photo tool, it only targets faces (usernames and text are manual), and the blur style is a single fixed effect.

3. Apple Markup — best for covering one face quickly

Built into iOS: Photos → Edit → Markup, then draw a 100%-opacity shape over the face. No install, no cost. But it's fully manual, easy to get wrong (semi-transparent ink leaks what's underneath), and impractical for group photos or busy screenshots.

4. Apple Clean Up — when removing beats blurring

On Apple Intelligence iPhones (15 Pro and later, iOS 18.1+), Clean Up erases a person and reconstructs the background. Great when you want no visible censoring at all; wrong tool when the person should stay in the image, and results vary on complex backgrounds.

5. Online blur websites — convenient, but check where the pixels go

Browser tools need no install and work on any platform. The risk is structural: if the site processes images server-side, your sensitive photo has now been uploaded — exactly what you were trying to avoid. Some tools state that processing happens locally in the browser; verify before using one for anything sensitive, and skip them for IDs, financial data or photos of children.

Which should you choose?

Lots of screenshots, chat logs, or group photos: Blur ID — automation across faces and text is the whole game.
Occasional single face, zero budget: Signal's blur tool or Markup.
Person should disappear entirely: Apple Clean Up.
Non-sensitive image, no iPhone at hand: a reputable online tool, ideally one with in-browser processing.