If not, the website will fall back to the JPEG format. AVIF image format was developed by the Alliance of Open Media. The initial specification saw the light of the day on February 19, 2019.

JPEG XL is a new, free technology that meets the needs of photographers and anyone who values high-quality images. It performs better than traditional JPEG files and newer formats like HEIC, AVIF ...

better new image format people already forgot about: AVIF. As Google mentions in their blog post, Jpegli uses heuristics developed for JPEG XL, making it more of a JPEG XL successor (or improvement).

Microsoft has added support for the JPEG XL image format to Windows 11 24H2 by making the JPEG XL Image Extension available ...