Dithering Effect Generator

Dithering is an image processing technique that creates the illusion of additional colors or shades by arranging a limited set of colors in a pattern. When a display or printer can only show a small number of colors, dithering distributes quantization error across neighboring pixels so that the average perceived tone closely matches the original. The result is a distinctive textured look that has become an aesthetic in its own right.

The most well-known dithering method is Floyd-Steinberg, an error-diffusion algorithm published in 1976. It scans the image left to right, top to bottom, and pushes each pixel's rounding error onto its neighbors, producing organic, noise-like textures. Atkinson dithering, created by Bill Atkinson for the original Macintosh, is a lighter variant that only spreads ¾ of the error, yielding more contrast and white space — a hallmark of early Mac screenshots. Ordered dithering (Bayer matrix) uses a fixed threshold map to create regular, grid-like patterns favored in retro game art. Stucki dithering extends the error neighborhood further for smoother gradients.

Our tool lets you apply all four algorithms to any photo right in your browser. Adjust the number of color levels — from stark 2-tone black and white to a 16-level palette — and toggle between monochrome and full-color dithering. The technique is closely related to halftone (which uses sized dots instead of error diffusion) and image to grayscale (the first step in monochrome dithering). If you prefer organic texture without dot patterns, try adding film grain noise instead.

Today dithering is used in pixel art, GIF optimization, retro-style game graphics, lo-fi photography aesthetics, and print preparation. It's also fundamental to how e-ink displays (like Kindle) render images. Everything runs client-side — your photos are never uploaded, and you can experiment freely with different algorithms and settings.