Free Online Pixelate Image Tool

A pixelate tool replaces regions of an image with solid colour blocks by shrinking then enlarging it with smoothing disabled.

Your data is processed entirely in your browser and never sent to any server.

Instant results 100% private No signup needed

Drop an image here, or click to choose

Processed locally — your image never leaves the browser.

How to Use This Tool

  1. Upload the image you want to pixelate.
  2. Drag the block-size slider — larger blocks hide more detail.
  3. Confirm the censored area is fully obscured in the preview.
  4. Click Download PNG to save the mosaic image.

What Is a Pixelate Image?

Pixelation reduces an image to a grid of uniform colour blocks, each holding the average colour of the area it covers. It is the classic effect for censoring faces, licence plates, and screen content, and it doubles as a retro, 8-bit art style.

This tool works by scaling the image down to a fraction of its size, then scaling it back up with the canvas imageSmoothingEnabled flag turned off. With smoothing off the browser uses nearest-neighbour sampling, so each tiny source pixel becomes one crisp block instead of a blurred gradient. The block-size slider sets how aggressively the image is shrunk first.

Unlike blur, pixelation discards the detail inside each block entirely, which makes it harder to reverse — a real advantage when hiding sensitive information. All work happens in your browser with no upload.

Frequently Asked Questions

How does pixelation work here?
The image is scaled down to a tiny size, then scaled back up with smoothing disabled, so each source region becomes one solid block.
How big should the blocks be?
Larger blocks hide more detail. For privacy use a block size big enough that no text or features survive; for retro art, experiment.
Is pixelation reversible?
No. The detail inside each block is averaged away permanently, so keep the original if you may need it later.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

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