Pixelate Image
Turn a photo into a blocky pixel effect.
How to use Pixelate Image
Free pixelate tool: scale a picture down and back up with smoothing off to get a clean mosaic look.
Open Pixelate Image on toolpermarket and fill in the inputs the tool asks for.
In the Image field, open a photo to mosaic. Busy images show the effect best.
In the Block size field, choose how chunky the pixels are. Smaller blocks keep more detail; larger ones hide it.
Press Pixelate to compute the result. The output appears immediately below the form. Adjust the inputs and recalculate as many times as you need.
Read the result and use it as needed. If the number looks off, re-check your inputs and run it again — the math is deterministic, so the same entries always return the same answer.
Worked example. A block size of ten turns a face into a soft, blocky mosaic that still reads as a portrait.
Tips for accurate results.
Use pixelation to anonymize a background face.
Larger blocks hide detail but keep the silhouette.
Combine with brightness for a retro look.
When to use Pixelate Image. Obscuring identities or license plates. Creating a retro, low-res aesthetic. Hiding sensitive text in a screenshot.
When you actually reach for this
- You want to censor a face, plate, or detail by blurring it into blocks.
- You like a retro, low-res aesthetic on part or all of an image.
Where this tool stops being accurate
- Pixelation is destructive; you cannot un-pixelate a saved image, so keep the original.
- Block size controls coarseness: larger blocks hide more but look more extreme.
Frequently asked questions
How does the pixel effect stay private?
The picture is read locally and redrawn at a tiny size, then scaled back up with smoothing disabled so the blocks stay crisp. All of that happens on the canvas, so the source image is never uploaded or stored elsewhere.
Why disable smoothing instead of just resizing?
Disabling smoothing when scaling the small version back up is exactly what produces hard, visible blocks rather than a blurry shrink. The tool intentionally avoids anti-aliasing so you get the classic mosaic look instead of a soft miniature.
Can pixelation fully hide sensitive detail?
For faces, plates, and similar small features, a large enough block size makes them unrecognizable, which is why it is used for anonymizing. Very high-contrast or large text may still be partly legible, so check the result before relying on it for privacy.
Can pixelation be reversed?
No. Once blocks replace the detail, the underlying pixels are gone. Save an un-pixelated copy first.