How does pixelation work?

The image is shrunk to a small grid and then scaled back up with image smoothing disabled, so each cell of the grid becomes a solid block of colour. A larger block size collapses more source pixels into each block.

Is pixelation safe for censoring sensitive information?

Heavy pixelation (large block size) makes text and faces unreadable. For maximum safety, use a large block size so no fine detail survives, and remember that very light pixelation can sometimes be partially reversed.

Can I pixelate just part of the image?

This tool pixelates the whole image. To censor one region, crop to that region first, pixelate it, then place it back — or use a heavy block size across the whole image.

Are my images uploaded?

No. The effect is applied on a canvas in your browser and the image never leaves your device.

What is the Pixelate Image?

Pixelate any image online to a blocky mosaic — useful for censoring faces, licence plates or sensitive details before sharing. Choose the block size and everything runs in your browser, so your image is never uploaded. It runs free in your browser on Gera Tools, with nothing uploaded.

Pixelate Image — Gera Tools

Name: Pixelate Image
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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Pixelate any image

Apply a blocky mosaic effect to any image. The most common use is censoring — obscuring faces, licence plates, addresses or on-screen text before you share a screenshot. It is also a quick way to create a retro pixel-art look.

How it works

The tool downsamples your image to a small grid, then scales it back to full size with smoothing turned off:

grid width  = image width  ÷ block size
grid height = image height ÷ block size
→ scaled back up with imageSmoothingEnabled = false  (hard square pixels)

A larger block size means fewer, bigger blocks — heavier pixelation — while a small block size keeps more detail.

Choosing a block size for censoring

Block size	Effect	Good for
4–8 px	Light mosaic	Stylised pixel effect
16–32 px	Strong mosaic	Obscuring faces in a photo
40–80 px	Heavy mosaic	Fully censoring text, plates, IDs

For genuinely sensitive details, prefer a large block size so no readable detail survives.

Common uses

Redacting faces, names and licence plates in photos before posting.
Hiding personal data in screenshots (emails, account numbers, addresses).
Creating a deliberate pixel-art or retro-game aesthetic.

It all runs on a local canvas, so your images are never uploaded.