Pixelate an image with an instant preview

For creators and web teams finishing a visual before publishing or sharing it, this tool keeps the edit quick. Pixelate selected image areas for privacy or a blocky visual style.

Pixelate selected image areas for privacy or a blocky visual style. Check the finished look before downloading it, with no upload or storage of the source.

How to use

Open the tool and pick one PNG, JPEG, or WebP image from your device; the file must stay under 20 MB.
Move the block size control to make the pixelation fine, medium, or strongly visible.
Check the preview and confirm that any details you want hidden are no longer easy to read.
Run the process and save the finished image to your computer.

Example

Suppose you need to post a screenshot but do not want every small detail to be readable. Load the screenshot, increase the block size until those areas look safely obscured, then inspect the preview before downloading. The same setting can also create a retro, low-resolution look for a mockup or thumbnail.

Limits and formats

The final look depends heavily on the chosen block size, so compare a few settings rather than accepting the first one.
Pixelation is an image effect, not encryption or a formal privacy guarantee; use it only as one part of your publishing checks.
Only PNG, JPEG, and WebP inputs are supported, and each file must be 20 MB or smaller.
Review the downloaded file in your usual viewer, since preview scaling can make the effect appear slightly different.

Where processing happens

All work happens in your browser. The image you select is not uploaded, and no account is needed. Your device performs the block effect locally, then you download the modified file directly from the page.

Frequently asked questions

How do I know if the pixelation is strong enough?

Zoom in on the preview and look at the smallest details you wanted to hide. If letters, faces, or patterns remain recognizable, increase the block size and check again. For a purely decorative style, a smaller block size often gives a more pleasing texture.

Can I undo the effect after downloading?

The downloaded file is a new image, so the original remains untouched on your device. However, the pixelated version cannot be turned back into the source through this tool. Keep the original file if you may need it later.

Does this work on a phone or tablet?

It runs in a modern browser, so a phone or tablet can be used as long as the browser handles local image processing. Very large images may feel slower on older devices, but the interface remains the same.