RetroFormat Magazine

The Curious Case of XXB JPEG – Is It Glitch, Genius, or Ghost?

Every few years, a file format emerges from the depths of the internet that makes you question everything you know about digital imaging. is that format. On paper, it sounds like a typo. In practice, it feels like discovering a hidden room in your own house. What Is It? Officially, XXB JPEG claims to be a "hybrid lossy-lossless compression algorithm optimized for chromatic aberration and temporal dithering." Unofficially? It’s a JPEG that remembers .