filetity

IMAGE -> PIXELATED · Local tool

Pixelate image

Turn an image into blocks, for censoring or for effect.

Last updated

  1. 01 / Your device

    the file stays here

  2. 02 / Browser memory

    the work runs locally

  3. 03 / Back to you

    saved on this device

When you would use this

Situations, not settings.

Censoring a screenshot
Blocks are the convention people recognise as deliberately hidden, which a blur is not always read as.
Hiding a name or a number in a bug report
Averaging into blocks destroys the pixels rather than smearing them, so nothing is left to reconstruct.
A deliberate low resolution look
Larger blocks give the retro effect on purpose rather than by accident.

How it works / no cloud

A conversion engine, not an upload form.

filetity divides the image into squares of the size you choose and paints each square with the average of the pixels inside it. Averaging rather than sampling one corner matters: sampling can keep a single bright pixel from a face and leave it recognisable.

  • Offline ready
  • Installable app
  • No file limit queue

Straight answers

No accordion. Nothing hidden.

Is it free?
Yes, with no watermark and no page limit.
Does it need an account?
No. There is no account system.
Is my file processed on my device?
Yes. The file is read by your browser and never uploaded. There is no server to send it to.
What formats are supported?
JPG, PNG and WebP in. The same format out, so nothing else about the file changes.
What are the limits?
Block size from 2 to 64 pixels, applied to the whole image. There is no selective or partial pixelation here.
Does it work on mobile?
Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
Does it work offline?
Yes, after you have used it once. Your browser keeps what the tool needs, so it then works with no network connection.
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.

Keep working locally

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