posted in Technology
Intent to Ship: JPEG XL – Mozilla Hacks - the Web developer blog
hacks.mozilla.org/2026/08/intent-to-ship-jpeg-xl/🧨1
Replying to @lemmydividebyzero@reddthat.com
What is the big gain over AVIF?
It’s great at lossless? but I never use lossless for web images
Replying to @Eyekaytee@aussie.zone
the big win is that it can re-encode existing jpegs to shrink them by like 30%. also the image is compressed spatially (i think that’s the word) so it can be displayed as it’s downloading rather than coming in line by line.
But if you’re going through the trouble of re-encoding you might as well re-encode to AVIF, no?
Replying to @sunbeam60@feddit.uk
jxl can also extract the original jpeg bit-for-bit, meaning you can save space on disk and still serve exactly the same images as some clients expect. no rewrites.
Replying to @sunbeam60@feddit.uk
Re-encoding from JPEG to AVIF will always drop quality. Lossless re-encoding from JPEG to JPEG XL makes a pixel perfect reproduction, while shrinking file size.