Is my image uploaded to a server?

No. Everything runs in your browser via the Canvas API. Your image never leaves your device.

What file types are supported?

Any image format your browser supports: JPG, PNG, WebP, GIF, AVIF, BMP, and SVG. The output is always a PNG.

What does the Pixel Size slider control?

It sets the side length of each square pixel block in the output. A value of 1 means no pixelation; larger values (e.g. 20–50) produce a more pronounced mosaic effect.

Will the output dimensions match the original?

Yes. The pixelated image is rendered at the same pixel dimensions as the original; only the visual appearance changes.

Can I pixelate a very large image?

Yes, but very large images (over 6000 px wide) may be slow in older browsers. Modern browsers handle them fine.

How do I download the result?

Click the "Download Pixelated Image" button. The browser saves a PNG file named "pixelated.png" to your downloads folder.

Image Pixelator

Upload an image, drag the slider to set pixel block size, and download the pixelated result instantly in your browser.

Upload Image

Click to choose image JPG, PNG, WebP, GIF, AVIF

Pixel Block Size 10 px

2 px (subtle) 100 px (heavy)

Upload an image to see the pixelation preview

Summary

Image Pixelator applies a classic pixel-block (mosaic) effect to any image you upload. Using the HTML5 Canvas API, it downscales the image to a low-resolution grid then upscales it back — creating the chunky pixel look used in art, censoring, and retro aesthetics. Everything runs locally in your browser; your image is never sent to a server.

How it works

Click "Choose Image" and select any JPG, PNG, WebP, or GIF file from your device.
The image is drawn onto a hidden Canvas element.
Use the "Pixel Size" slider to choose the size of each pixel block (2 px – 100 px).
The Canvas downscales the image to block-grid resolution and scales back up, creating the pixelation.
Preview updates live as you drag the slider.
Click "Download" to save the pixelated image as a PNG file.

Use cases

Create retro pixel art from photographs.
Censor or anonymize faces and sensitive regions in screenshots.
Generate a mosaic thumbnail or placeholder for a design mockup.
Produce lo-fi / 8-bit style artwork for social media.
Quickly test how an image looks at very low resolutions.
Add a creative pixelation overlay to marketing visuals.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu