Pixelate Image
Pixelate images online free with a mosaic blur effect.
or click to browse — JPG, PNG, WebP
Original
Pixelated
How to use this tool
Upload an image
Drag & drop or browse. JPG, PNG or WebP — everything stays on your device.
Choose pixel size
Slide from 4 px (subtle) to 64 px (heavy mosaic). Preview updates as you drag.
Download
Save the pixelated image as a PNG in one click, or start over with a new photo.
Frequently asked questions
How does pixelation work?
Your image is shrunk down to a tiny grid and then scaled back up without smoothing — each grid cell becomes one solid block of color, the classic mosaic effect.
Is my image uploaded anywhere?
No. Pixelation runs entirely in your browser with the canvas API. Your files never leave your device.
What pixel size should I use?
4–8 px gives a subtle retro look; 16–24 px is the classic censor-style mosaic; 48–64 px turns the photo into near-abstract blocks. Drag the slider and watch the preview.
Will the download keep my original resolution?
Yes — the pixelated result is rendered at your image's original dimensions and saved as a lossless PNG.
Can pixelation be reversed?
No. Once the detail is merged into blocks, the original information is gone from the downloaded file — keep a copy of the original if you need it.