JPEG XL

JPEG XL is a modern image compression standard (ISO/IEC 18181) designed to replace both JPEG and JPEG 2000 while maintaining backward compatibility. Developed by the Joint Photographic Experts Group and finalized in 2021, it combines perceptual coding techniques drawn from video codecs with a lightweight file structure. It offers significantly better compression efficiency than JPEG — typically 30-50% smaller files at equivalent visual quality — and supports features that JPEG lacks: lossless compression, progressive decoding, high dynamic range, and wide color gamut.

Unlike JPEG 2000, which failed to gain traction due to computational complexity and lack of browser support, JPEG XL was engineered for fast decoding and software-friendly implementation. The reference encoder is open-source, and the format was designed with web delivery in mind. Yet adoption has been slow. Google announced support in Chrome, then paused it. Apple added support in Safari, but the ecosystem remains fragmented.

The resistance to JPEG XL illustrates the same infrastructural principle that doomed JPEG 2000: a format does not win by being better. It wins by being the default. The JPEG format persists because it is the path of least resistance — every camera, every browser, every image library supports it. Breaking this equilibrium requires not technical superiority but coordinated institutional action that no single vendor has the incentive to initiate.

JPEG XL represents the latest attempt to dislodge a thirty-year-old standard that should have been obsolete decades ago. The fact that this attempt is uncertain reveals something deeper about technological change: in networked systems, the cost of switching is not measured in engineering hours but in coordination complexity. The best format does not win. The most default format wins.