Pixelate Image
Pixelate a photo to censor or stylize it. Runs in your browser — nothing is uploaded.
About Pixelate Image
Pixelate Image replaces a region with large blocks of averaged colour, producing the mosaic effect used to censor faces and sensitive details. The block size is adjustable, and the effect is written into the exported file rather than layered over it. It runs in your browser.
Pixelation and blurring hide the same information but communicate differently. A blur can look like a camera problem; a mosaic is unmistakably deliberate. That is why broadcast journalism, court reporting and documentary photography lean on pixelation — it tells the viewer that something has been withheld on purpose, which is a statement blurring does not clearly make.
It carries a warning worth taking seriously, though. Light pixelation of predictable content can be reversed. If you mosaic a six-digit code with small blocks, software can generate every possible value, pixelate each one the same way, and match the pattern — recovering the original in seconds. This has caught out people who pixelated card numbers and passwords believing them safe. For anything short and guessable, use blocks large enough that the region is a single flat colour, or cover it entirely.
How to Pixelate Image
- Select the image you want to censor.
- Mark the region to pixelate.
- Increase the block size until no structure remains visible in the area.
- Check the whole frame for other identifying details you may have missed.
- Download the pixelated image.
Tips & common problems
Bigger blocks for anything guessable
Short codes, numbers and plates can be recovered from light pixelation by brute force. Use blocks coarse enough that the region reads as flat colour, not texture.
Pixelation signals intent
Choose it over blur when you want the viewer to understand that information was deliberately withheld, which is the convention in journalism and reporting.
Never rely on it for credentials
Card numbers, passwords and API keys should be cropped out or covered with a solid block, not obscured. Some things should not be in a shared image at all.
Cover generously
Pixelating exactly a face leaves hair, clothing and posture intact, which can still identify someone in context. Extend the region a little wider than feels necessary.
Frequently asked questions
How do I pixelate an image for free?
Select it, mark the area, set the block size and download. No signup, no watermark and nothing uploaded.
Is my photo uploaded?
No. Pixelation happens entirely in your browser, so the uncensored original never leaves your device.
Can pixelation be reversed?
Sometimes, for short and predictable content. An attacker can pixelate every candidate value and match the resulting pattern. Large blocks defeat this; fine mosaics on a six-digit number do not.
Should I pixelate or blur?
Both conceal detail. Pixelation reads as intentional censorship and suits journalistic and documentary use; blur looks more natural and less conspicuous. For strong concealment, use large blocks either way.
Can I pixelate more than one area?
Yes, mark as many regions as you need — several faces in a group photo, or a face and a house number in the same image.
Is the effect permanent in the downloaded file?
Yes. The pixels are genuinely altered and exported, so the original detail is not present in the image you download.