This web app I coded along with Grok 3 (by "with" I mean Grok did 95% of the work).
Also thought you'd like to know your image is NOT sent anywhere or saved by anyone other than you, all the processing happens in your browser.
Anyway with it you can edit images to have a Floyd-Steinberg style dithering effect for a cool retro vibe.
Here is an example of a dithered image, It's one of my 3D y2k art pices with the effect:
