Pixelate Photo Online
Draw a box over anything sensitive to pixelate photo regions with a hard mosaic, right in the browser, with nothing ever uploaded.
- 🔒 Never Uploaded · censoring stays on your device
- ⬛ Precise Selection · pixelate only what needs hiding
- 🆓 Free & Unlimited · no signup, no watermark
- 📱 No App Needed · opens in any browser
Click to select a photo or drag & drop here
Supports JPG, PNG, WebP · Max 100MB
Drag on the photo to select an area.
What Does Pixelating a Photo Mean?
To pixelate a photo means covering part of it with a mosaic: the pixels inside the selected area are merged into hard, uniformly colored squares, so the underlying detail is destroyed instead of merely covered. It is the standard visual language for "something is hidden here", from broadcast TV to court documents to marketplace photos.
Unlike a black bar, a mosaic keeps the shape and color of what is underneath, which looks natural and signals that the censoring was deliberate. Unlike a blur, properly sized pixelation cannot be sharpened back into the original. This tool exists to pixelate photo regions precisely: it applies the mosaic to exactly the box you draw, at the block size you choose, without uploading anything. (For shrinking files without the mosaic look, the quality reducer on our homepage is the right tool.)
What to Pixelate: Real Privacy Scenarios
Faces of people who did not agree to be posted
Group photos, event pictures, and street shots often contain bystanders, minors, or colleagues who never agreed to appear online. A 16 to 24 pixel mosaic over each face removes identifiability while keeping the scene intact. It is the polite default when sharing wedding, school, or party photos in public groups.
License plates when selling or showing cars
A plate number can be looked up against registries and tied to a home address in several countries. Marketplace listings, meet-up photos, and parking shots routinely expose them. Draw a box over the plate, pick the license plate preset, and the number is gone before the photo reaches strangers.
Text: names, addresses, and document screenshots
Screenshots carry more personal data than any photo: full names in chat headers, email addresses, order numbers, street addresses, and invoice totals. Smaller blocks of 8 to 12 pixels are enough for text because letters are thin. Check the result at full zoom before sharing, since a partial mosaic over half a word can still be read from context.
Sensitive screen content
Direct messages, medical portals, banking apps, and boarding passes show up in "look what happened" posts every day. The screenshot preset uses large blocks because this content is high stakes: censor generously, including the surrounding UI, and remember that notification previews often leak data above the part you actually meant to show.
Children, homes, and locations
Parents sharing school-run moments, sellers photographing interiors, and travelers posting from apartments all reveal where people live and sleep. A mosaic over house numbers, distinctive landmarks, and kids' faces keeps the memory shareable without turning it into a location disclosure.
How to Pixelate Part of an Image
Most censoring jobs target one small area of an otherwise fine picture, which is why this tool is built around a selection box instead of a whole-image filter. Drag anywhere on the photo to draw the region, watch the mosaic render live while you adjust the block size, then apply it. Need several areas? Apply one box, then draw the next; every step is undoable and the original stays one click away until you download.
For the rare case where the entire photo should become a mosaic, the Whole image button covers it in one tap. The file keeps its original pixel dimensions either way: censoring changes what the pixels show, not how many there are.
Blocks and Grid Lines
Block size is the security dial. Four-pixel blocks are decoration; 48-pixel blocks are a wall. Faces and plates become unreadable somewhere in the 16 to 24 range on typical phone photos, while text usually needs less because strokes are thin. When in doubt, zoom in and try to read it yourself: if you can, make the blocks bigger.
The optional grid lines setting strokes the block boundaries, which makes the censoring look deliberate and technical rather than accidental, and helps you verify the coverage at a glance. Some workflows also prefer the gridded look for documentation and reports. For an artistic take on squares with color boost and clean output, see the pixelation effects in our low quality image maker.
Mosaic vs Blur, and a Note on Pixel Art
Blur and mosaic are not equally safe. A Gaussian blur is a smooth mathematical transform, and published research has repeatedly demonstrated attacks that partially reconstruct blurred text and faces. Large-block pixelation does not transform the content, it replaces it: the sample points inside each block are averaged into one square, and the information in between is discarded at render time. For anything genuinely sensitive, mosaic with generous block size is the safer default.
A note for the pixel art crowd: this page is built for censoring, not for creating sprites. If your goal is blocky artwork, retro thumbnails, or 8-bit stylization rather than privacy, the maker page linked above is the better starting point, since it tunes color and edges for looks instead of unreadability.
How to Pixelate a Photo
-
Open Your Photo
Click or drag & drop any JPG, PNG, or WebP file. The photo stays on your device the whole time.
-
Drag a Box Over the Sensitive Area
Draw a selection over the face, plate, or text you want hidden. Adjust the block size with the slider and watch the mosaic update live.
-
Download the Censored Copy
Apply the mosaic to as many areas as needed, then download. No watermark, no signup.
Why Censor Photos Here
Built for Sensitive Images
The photos people censor are exactly the ones that should never touch a server. Nothing is uploaded, logged, or retained, because there is nowhere for it to go.
Selection, Not Destruction
Pixelate the plate, keep the car. Region selection with live preview means you hide precisely what needs hiding and nothing else.
Forgiving by Design
Multiple areas, step-by-step undo, and a one-click reset back to the original. Censoring should be careful work, not permanent anxiety.
Nothing to Install
No app download, no account, no limits. It opens in a browser tab on any device and gets out of the way.
Pro Tips for Censoring Photos
Censor a little wider than the target
Faces move, text wraps, and plate edges catch highlights that hint at characters. Extend the box a few pixels past the visible boundary of what you are hiding. A slightly generous mosaic reads the same to viewers but removes the partial clues at the edges.
Zoom in before you trust it
Small text survives surprisingly large blocks when the viewer zooms. Before downloading, view the photo at full size and try to read the censored area yourself. If any shape is still recognizable, bump the block size and apply again over the same spot.
Never share the original alongside
A censored photo next to its uncensored source, in the same album, chat, or metadata folder, defeats the whole exercise. Download the censored copy, and double-check which variant you attach when replying in threads that already contain the original.
Frequently Asked Questions
How do I pixelate a photo?
Open your photo, drag a box over the area you want hidden, adjust the block size, and download. It takes seconds to pixelate photo content this way, and the mosaic is applied entirely in your browser.
How do I pixelate only part of an image?
Drag with your mouse or finger directly on the photo to draw a selection box. Only the inside of the box gets the mosaic, so the rest of the picture stays sharp. Repeat for additional areas before downloading.
Are my photos uploaded anywhere?
No. The tool runs entirely in your browser and nothing is transmitted. This matters most for exactly the photos people censor: documents, messages, and images of real people.
Is a mosaic safer than blurring?
Generally yes. Blurring is a mathematical operation that researchers have shown can sometimes be partially reversed, while large-block pixelation destroys the underlying detail outright. For sensitive content, use a block size large enough that nothing recognizable remains.
What block size should I use?
For faces and license plates, blocks of 16 to 24 pixels are enough to make them unreadable. For small text, 8 to 12 pixels usually works. If you can still read it, increase the size or apply the mosaic twice.
Can I pixelate several areas of one photo?
Yes. Apply the mosaic to one selection, then draw another box and apply again. Undo steps back one area at a time, and Reset restores the original photo.
Do I need to install an app?
No. The tool opens in any modern browser on desktop, tablet, or phone, with nothing to download and no account to create.
Can this tool fix or unpixelate a photo?
No. Repairing a pixelated image is the opposite job, and this tool does not attempt it. It only applies mosaic censoring.
Ready to Pixelate a Photo?
Free, instant, and private. Your photo never leaves your device.
Start Censoring Now