# Pixelate image

Pixelate an image by averaging it into blocks, the usual way to censor a screenshot. Free, no watermark, and nothing is ever uploaded.

Canonical page: https://filetity.com/pixelate-image

## Capabilities

- Free: Yes, with no watermark and no page limit.
- Account required: No. There is no account system.
- Processed on device: Yes. The file is read by your browser and never uploaded. There is no server to send it to.
- Formats: JPG, PNG and WebP in. The same format out, so nothing else about the file changes.
- Limits: Block size from 2 to 64 pixels, applied to the whole image. There is no selective or partial pixelation here.
- Mobile: Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
- Offline: Yes, after you have used it once. Your browser keeps what the tool needs, so it then works with no network connection.

## Questions

### Is pixelating enough to hide sensitive information?

Not reliably. Pixelated text in particular has been recovered before, because a block average still carries information about what was underneath and the set of possible characters is small. If you are hiding a name, an address or a card number, cover it with a solid block rather than pixelating it.

### Can I pixelate just one area?

Not on this page. It applies to the whole image. Crop the region out, pixelate it, and paste it back if you need it in one place only.

### What block size should I use?

Bigger blocks hide more. For a face in a photo, something around a twentieth of the face's width is the usual starting point. The page shows the size in pixels so you can judge it against the image's own dimensions.

### Why are the blocks at the right or bottom edge narrower?

Because the image does not divide evenly by the block size. The last block in each row is cut short at the edge rather than reading past it, so a 1000 pixel wide image at block size 12 ends with a 4 pixel column.

### Does it keep a transparent background?

Yes. Alpha is averaged along with the colour inside each block, so a clear area stays clear and a soft edge becomes a blocky one rather than a hard line.

## Related tools

- [Blur image](https://filetity.com/blur-image): Apply an adjustable blur to an image.
- [Crop Image](https://filetity.com/crop-image): Cut an image down to the part you want, by dragging or by exact pixels.
- [Invert image colors](https://filetity.com/invert-image-colors): Flip every colour in an image to its opposite.