Dither+ — Free online image dithering tool

Dither+ lets you apply classic image dithering algorithms — Floyd–Steinberg, Atkinson, Jarvis-Judice-Ninke, and ordered Bayer (4×4 / 8×8) dithering — to any image directly in your browser. Choose grayscale, RGB, or a custom color palette, adjust the number of levels, and download the result. All processing happens locally on your device — no image is ever uploaded to a server.