Is browser-side censorship really safe?

Yes - the pixelated output is the only file that exists after you save it. The original is in your browser memory only and gone the moment you close the tab. No upload, no server log, no cached copy elsewhere.

What block size guarantees privacy?

20+ px on a typical 12 MP photo. At that level, each block is averaging ~400+ source pixels into one colour - reconstruction would need information that's mathematically gone. 30-40 px for paranoid use cases (court evidence, witness protection).

Pixelate vs solid black box - which one?

Solid black is the strongest possible censorship (zero information leak), but it's visually heavy. Pixelate keeps the rough shape recognisable (still reads as 'a face' or 'a plate') while removing identifying detail. Pick solid for max security; pixelate for readability.

Can I censor only specific areas in a video frame?

Yes - the same regions / block size you set apply only to the rectangles or ellipses you draw. The rest of the frame stays at native resolution.

Does this work for batch censorship?

Currently single-photo at a time. For batch privacy, our /features/add-watermark-to-photo page accepts up to 30 photos and lets you stamp a 'CENSORED' or solid block across each via the watermark image upload.

100% browser-side · No upload · Free

Censor Photo Online

Block out faces, plates, IDs, NSFW areas, or screen content with hard mosaic censorship. Drag rectangles or ellipses, tune block size, save - 100% browser-side, no upload.

Drop a photo to start

JPG, PNG, WebP, HEIC up to 40 MB · stays in your browser

Never uploaded · 100% browser-side

No upload · stays in browserInstant · no waitingFree · no signup, no watermark

How it works

1
Drop your photo
Drag & drop or browse. JPG, PNG, WebP, HEIC up to 40 MB. We pre-place a default region in the centre - drag it where you need.
2
Draw censorship blocks
Drag rectangles or ellipses over content to censor. Add as many regions as you need - rearrange and resize freely.
3
Save with full censorship intact
Output is identical to what you see in the live preview. Save in JPG, PNG, or WebP - censorship is baked in, not a separate layer.

Why use this online tool

Real censorship

Pixelated areas are genuinely irrecoverable - each block is a single averaged colour, no spatial detail left. Safer than blur for legal / evidence / NSFW use cases.

Multi-region

Censor several elements in one photo - all faces, all plates, all sensitive zones - without re-uploading or re-running per region.

Browser-side privacy

Photos never leave your device. No data leak risk if a cloud service got breached.

Free, no signup

Unlimited censoring, no per-region cost, no watermark on output.

When to use it

Journalists obscuring source faces / identifying details before publication
Court / legal evidence scrubbed of bystander identities
Whistleblower screenshots redacting names, accounts, IPs
NSFW posts censored to platform-acceptable level for social media
Forum / Reddit posts blocking out personal info before sharing

Frequently asked questions

Is browser-side censorship really safe?: Yes - the pixelated output is the only file that exists after you save it. The original is in your browser memory only and gone the moment you close the tab. No upload, no server log, no cached copy elsewhere.
What block size guarantees privacy?: 20+ px on a typical 12 MP photo. At that level, each block is averaging ~400+ source pixels into one colour - reconstruction would need information that's mathematically gone. 30-40 px for paranoid use cases (court evidence, witness protection).
Pixelate vs solid black box - which one?: Solid black is the strongest possible censorship (zero information leak), but it's visually heavy. Pixelate keeps the rough shape recognisable (still reads as 'a face' or 'a plate') while removing identifying detail. Pick solid for max security; pixelate for readability.
Can I censor only specific areas in a video frame?: Yes - the same regions / block size you set apply only to the rectangles or ellipses you draw. The rest of the frame stays at native resolution.
Does this work for batch censorship?: Currently single-photo at a time. For batch privacy, our /features/add-watermark-to-photo page accepts up to 30 photos and lets you stamp a 'CENSORED' or solid block across each via the watermark image upload.

Related free tools

Pixelate Photo

Drop a photo, drag rectangles or ellipses over what you want to censor, tune block size 4-60 px. Multi-region, instant preview, 100% browser-side.

Blur Region of Photo

Drag a rectangle or ellipse over any part of a photo and blur it - hide faces, license plates, IDs, sensitive text. Multi-region, drag-to-resize, browser-side.

Hide License Plate in Photo

Drag a rectangle over the plate and blur it instantly - safe for marketplace ads, insurance evidence, social posts, and used-car listings. Multi-plate support for shots with several vehicles.

Watermark to Photo

Brand single photos or whole batches with a custom text or logo watermark. Drag-to-place, drop-shadow, opacity slider - then download a ZIP of all watermarked photos in one click. Up to 30 photos at once, 100% browser-side.

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