Pixelate Image

Apply a mosaic pixelate effect to hide sensitive details.

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Click or drag image here

JPG, PNG, WebP supported · Max recommended 25MB

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About this tool

Apply a pixelate or mosaic effect to any photo online for free with ResizerPhoto. Pixelation is used to hide sensitive details, obscure faces for privacy, or create an artistic retro 8-bit look. Our tool lets you control the block size for the effect.

Key features

Adjustable pixel block size
Mosaic pixelate effect
Works with JPG, PNG and WebP
Browser-based — no server upload
Preserves original dimensions
Free with no limits

Common uses

Hide faces in photos for privacy
Blur sensitive information with mosaic effect
Create retro 8-bit pixel art effect
Obscure license plates in photos
Hide private details before sharing screenshots

How it works

Pixelate Image applies its effect directly to the pixel data of your photo in the browser, and the preview updates live as you move the slider so you can see the exact result before downloading — nothing is applied permanently until you save the file.

Tips for best results

Make small adjustments and check the preview often — extreme settings rarely look natural.
Apply one effect at a time so you can undo just that change if it doesn't look right.
Work from the original photo each time rather than editing an already-edited file, to avoid quality loss.
Good lighting in the original photo means you'll need far less editing afterward.

Frequently asked questions

What block size should I use?

Larger block sizes create a stronger mosaic effect. Use 10-20px for subtle pixelation and 30px+ for a strong artistic effect.

Can I pixelate only part of the image?

Our tool applies pixelation to the whole image. For selective pixelation, use a desktop editor.

Is pixelation reversible?

No. Once pixelated and downloaded, the original detail cannot be recovered from that file.

What is the difference between blur and pixelate?

Blur creates a smooth out-of-focus effect. Pixelate creates a blocky mosaic pattern by averaging pixels in each block.

Can I use pixelate for privacy protection?

Yes. Pixelation is commonly used to hide faces, license plates and other sensitive details. Use a large block size for stronger privacy protection.

Can I combine this effect with other edits?

Yes. Use one tool, download the result, then upload that file into another tool on this site to layer edits.

Does editing reduce the original file's resolution?

No, this changes how the pixels look, not how many pixels the image has.

Will this work on photos taken with a phone camera?

Yes, any standard JPG, PNG, or WebP photo from a phone or camera works with this tool.