Posterize Image Online: Reduce Color Count
Reduce an image’s number of colors (posterize) and download the result, in your browser.
Color quantization (canvas), 100% local.
🔒 100% client-side — no data sent
Reduce the number of colors in an image to create a posterization effect with bold flat areas, like a screen print or poster. The result is computed 100% in your browser with no file upload, protecting your privacy.
What is it for?
- ▸ Turn a photo into a poster- or pop-art-style graphic visual
- ▸ Simplify an image to prepare a screen print or a cut-out
- ▸ Create flat-color illustrations for web or print
- ▸ Get a quick artistic effect without heavy editing software
FAQ
What does posterization do?
Posterization groups nearby shades into a smaller set of colors, replacing smooth gradients with bold, visible flat areas.
Can I choose the final number of colors?
Yes, you control the posterization level to keep more or fewer colors depending on the effect you're after.
Is the processing done on a server?
No, posterization is applied locally in your browser; no image is uploaded or stored anywhere.