Pixelate Image Online

Upload your image, adjust the pixel block size slider to control the intensity of the mosaic effect, then download. Larger block sizes create stronger pixelation. All processing happens in your browser.

Pixelation replaces areas with solid-color square blocks (mosaic effect), while blur smoothly blends neighboring pixels. Pixelation is often preferred for censoring as it's clearly intentional and impossible to reverse.

This tool applies pixelation to the entire image. For selective area pixelation, try ScreenSnap Pro which lets you draw pixelation regions directly on screenshots.

Yes. Once downloaded, the pixelated areas cannot be recovered. The original pixel data is permanently replaced with averaged block colors, making it safe for redacting sensitive content.