Pixelate or Censor an Image

No. Decoding, pixelation, and encoding all run on a canvas inside your browser. The file never leaves your device, which matters when you are redacting private information.

No. Each block is permanently replaced by the average colour of the pixels inside it, so the original detail in that area is discarded in the downloaded file. Nothing is stored that could reconstruct it.

Yes. Switch Apply to from Whole image to Region, then drag a box over the area to hide, such as a face or an address. Only that rectangle is pixelated and the rest stays sharp.

Use a coarse block. The slider goes to 80 px, and larger blocks average more pixels together so no readable text or facial detail remains. A small block leaves a light mosaic that can still hint at the original.

You can open PNG, JPEG, WebP, GIF, and BMP. You can export to PNG, JPEG, or WebP. PNG is lossless and avoids compression artifacts around the mosaic edges.

Re-encoding through the canvas drops the embedded EXIF data, so camera and GPS tags do not carry into the saved file. If metadata removal is your only goal, an EXIF remover is more direct.

The preview is downscaled so large photos render quickly, and the block size is scaled to match. The download is processed at full resolution, so the exported file keeps the original pixel dimensions.

There is no fixed limit. Because the work happens locally, very large images are bounded only by your device memory and may take a moment to render or export.

Blur smears neighbouring pixels but can sometimes be partly undone. Coarse pixelation replaces whole blocks with a single flat colour, which discards the underlying values and is a stronger choice for redaction.