Analysis Argues Against JPEG XL Adoption for Web Despite Technical Merits

JPEG XL's Technical Standing

JPEG XL is recognized as a technically advanced image codec, offering a definitive upgrade over JPEG and greater versatility than WebP. Despite its capabilities and attention from major companies, Chrome famously rejected its inclusion in 2023. This decision was met with criticism, given JPEG XL's royalty-free nature, flexibility, and compression efficiency.

Recent Decoder Integration

Recently, a Rust-based JPEG XL decoder has been integrated into Firefox and Chrome, suggesting a potential reconsideration by major web stakeholders. This development follows a WebP vulnerability in 2023, leading some to speculate if the new decoder addresses security concerns that might have previously hindered JPEG XL's adoption.

Expert's Stance on Web Utility

An image compression expert, who previously advocated for JPEG XL, now argues against its broad web implementation. The author, who has worked on AVIF and developed their own encoder, chose not to focus on JPEG XL for future work. This decision stems from an empirical assessment of current image compression and web platform needs.

Limited Web Use Cases for Lossless

The analysis highlights that most web content relies on versatile lossy compression, with few use cases requiring lossless quality. JPEG XL's lossless advantage is deemed less significant for the web, as it provides only an approximate 11.9% size reduction over lossless WebP, based on test datasets that are not representative of typical web images (e.g., 157 MP photos, 10 MP illustrations, 27 MP books).