Simulate vintage Macintosh & GameBoy error-diffusion dithering.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Select your photo.
Choose Floyd-Steinberg, Atkinson, Bayer 4x4, or Threshold.
Fine-tune light/dark quantization cutoff.
Export the retro dithered image.
Atkinson dithering was created by Bill Atkinson for the original 1984 Apple Macintosh to render smooth shades on 1-bit screens.
Yes, each pixel is strictly #000000 or #FFFFFF.
Zero-egress companion tools in the Image Processing suite
Convert and compress WebP, PNG, and JPEG images locally with zero server uploads.
Clean, minify, and sanitize SVG files and markup locally.
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