Posterize an image by reducing color levels
Upload an image and reduce the number of color levels per channel for a flat, screen-print, or comic-style posterized effect. Preview the setting and download the processed image without uploading it to a server.
Use this tool freeBrowser tool
Posterize image
Runs locally in your browser. The selected image is not uploaded by this tool.
JPEG, PNG, and WebP are supported by default. Specialized converters restrict the file picker to their required input format.
How to use
Upload an image
Drag a JPEG, PNG, or WebP file into the tool. The image loads at full resolution in the editor.
Choose color levels
Set the number of color levels per channel. Fewer levels create a stronger poster effect.
Preview the effect
Use the browser preview, then adjust levels until the image has the flat-color look you want.
Download
Click download to save the posterized image.
Features
Adjustable color levels
Choose 2 to 32 levels per color channel to control how strong the posterized effect appears.
Local pixel remapping
Each pixel is quantized on browser canvas without sending the image to a server.
Client-side canvas processing
Processing uses browser canvas APIs, so the image stays on your device.
Download-ready output
Export the posterized result as PNG, JPEG, or WebP depending on the uploaded file and browser support.
After this task
After this free tool, open Ai Enhance for the next AI editing workflow.
Continue with Ai EnhanceSpecifications
| Input formats | JPEG, PNG, WebP |
| Output formats | PNG, JPEG, WebP when supported |
| Color levels | 2–32 per RGB channel |
| Presets | Comic bold, screen print, balanced, subtle bands |
| Processing | Client-side canvas (no upload) |
Related Magic Eraser Tools
Common questions
What color level should I choose?
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Start around 5–8 levels for a clear poster effect. Use 2–4 levels for bold comic bands, or 12–16 levels when you want a subtler graphic look.
Does posterizing reduce the actual color palette?
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Yes. The tool remaps each red, green, and blue channel to fewer steps, which creates flatter color regions while preserving the original image dimensions.
Can I undo the posterize after saving?
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Once downloaded, the posterized pixels are baked into the new file. Keep your original image if you may need the full-color version later.
Want to sharpen instead of posterize?
AI Enhance can intelligently sharpen soft or out-of-focus photos, recovering detail that simple sharpening filters miss. Try it on photos that need the opposite of posterize.
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