Dither Bench: a dithering tool that runs entirely in your browser. It reduces an image to a small palette with one of ten dithering algorithms. Without an image it shows a generated night scene. Keys: 1 to 9 and 0 choose the algorithm, P cycles the palette, S toggles serpentine scanning, the bracket keys change the pixel size, R resets brightness and contrast, O opens an image, D downloads the result, N shows the next example scene, and holding Space shows the original.