Image Pixelator – Pixelate Any Photo Online, Free, No Sign-Up

Pixelation does two jobs at once: it is a retro art style, and it is the classic way to hide a face, a licence plate or a document in a photo before you share it. This free pixelator gives you one slider — pixel size — and a live preview at full resolution. Nothing is uploaded; the effect is computed in your browser.

Small blocks keep the picture recognisable with a gentle mosaic feel. Big blocks turn it into chunky 8-bit art — or bury a detail so thoroughly that nobody can recover it.

How to pixelate an image

Click the file box and choose any image — JPG, PNG, WebP or AVIF.
Drag the Pixel size slider. The preview updates as you drag.
When it looks right, click Download pixelated PNG. The PNG is saved at the original pixel dimensions.

A worked example, with the numbers

Take a 1200 × 900 photo. At a pixel size of 12, the tool divides it into 100 × 75 blocks — 7,500 blocks, each filled with the average colour of its patch of the original. Faces are softened but the scene stays readable. At a pixel size of 48, the same photo becomes 25 × 19 blocks: pure pixel art, and any text or face inside is gone for good. At 4 pixels you get a subtle retro grain that still looks photographic.

Pixelating for privacy — read this first

Use big blocks for real secrets. A face pixelated at 8 px can sometimes be guessed; at 30 px or more there is mathematically nothing left to recover.
Check the whole frame. Reflections in windows and mirrors, house numbers and name badges hide in corners.
Pixelation here is permanent. The download is a flat PNG; the original detail is not stored in it. Keep your own copy of the original somewhere safe.

Pixelating for art

Pixel art looks best when the block count is low and the palette is bold. Try sizes between 8 and 20 on portraits for a game-sprite feel, then drop the result into our photo editor to push contrast and saturation. Because the export keeps the original dimensions, a pixelated 4000-pixel photo prints surprisingly well as a poster.

Honest limitations

The effect applies to the whole image evenly — for hiding one small area while leaving the rest sharp, use our blur tool’s region mode, or pixelate here and composite in an editor. Very large photos (say 8000 pixels wide) can take a second or two to re-render on each slider move, especially on older phones.

Pixel size cheat sheet

4–8 px — subtle retro grain; textures, backgrounds, a stylised portrait that stays recognisable.
8–20 px — honest pixel art; game sprites, avatars, posterised photos.
25–40 px — licence plates, documents, screens: content unreadable, scene still understandable.
40–100 px — faces and anything genuinely sensitive: identity is gone, only the composition survives.

Frequently asked questions

Can pixelation be reversed?

No. Each block stores only the average colour of its patch; the detail inside the patch is discarded. That is precisely why pixelation is trusted for privacy where a light blur is not.

What pixel size hides a face?

As a rule, the block size should be at least the width of one eye, and ideally a third of the face width. On a typical portrait that means 25–60 px. When in doubt, go bigger and zoom in to check.

Does the tool change my image size?

No. The downloaded PNG has exactly the same pixel dimensions as the file you loaded — only the content is blocky.

Embed this tool on your website — free

Copy the code below to add this working tool to your own page. A small credit link stays with it — that’s all we ask.