Flat color bands
Posterization reduces smooth gradients into hard steps. Upload a photo, choose the number of color levels, and preview the posterize effect online. The tool maps each RGB channel into distinct color bands, creating a flat, graphic look.
Level limits
The color levels run from 2 to 32. At 2, the image snaps into stark, high-contrast chunks ideal for a stencil or comic-book style. Values between 4 and 8 create the classic posterize image filter look. Values closer to 32 retain more of the original shading while still flattening the image colors slightly.
Source images
Photos with soft light changes show broad, visible bands after posterizing. Flat graphics, screenshots, or vector-style artwork tolerate lower level counts better because they already lack natural gradients. If a photo has heavy compression noise, a low color level setting might amplify that noise into harsh speckles.
Format support
The browser processes the image locally without uploading it. The posterize tool online reads the pixel data and snaps the red, green, and blue values into the selected buckets. The alpha channel remains untouched. You can posterize images in JPEG, PNG, or WebP, and the full-resolution download keeps the original format.