Image Posterize

Reduce the number of color levels per channel for a flat, posterized look.

Tool Media & Files Updated Apr 19, 2026
How to Use
  1. Drop image.
  2. Set levels per channel (2–16).
  3. Download.
Image
Drop image
Preview

Notes

Formula
round(v·L/255)·255/L
Per channel
R, G, B independently
Total colors
Banding
Intentional
Output
PNG
Privacy
Local

About the Image Posterize

Working on image, audio and file tasks? The Image Posterize is a free browser tool that gives you the answer in seconds. Reduce the number of color levels per channel for a flat, posterized look.

How it works

Type in what you have, and the answer shows up right away. Change anything and it updates by itself. Everything runs in your browser, so it is fast and nothing you type is sent away.

Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.

Frequently Asked Questions

2 levels?

Pure 2-color per channel — very stylized.

How do I use the Image Posterize?

Just type your numbers. The answer shows up right away — there is no button to press. Change anything and it updates by itself.

Do I need to install or sign up for anything?

Not at all — it runs in the browser with nothing to install and no account. After it loads once, it even works without an internet connection.

Is my information private?

Yes. Everything happens in your browser. Nothing you type is sent to a server or saved anywhere.

Common Use Cases

Poster art

Warhol-style.

Vector prep

Fewer colors = easier vectorize.

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