JPG to JPEG XL results in higher file size

When I try to export a JPG image to JPEG XL, it becomes around 4mb bigger. When I try to do the same thing in Affinity Photo, it is around 2mb smaller. Is there a setting I’m missing here?

Screenshot 2025-01-26 at 6.47.36 PM

What was the compression / quality setting you had for both Acorn and Affinity? If Acorn’s had a higher quality rate (or the “lossless” option was checked), then you’ll get a larger file size.

I believe they’re using the same equivalent settings. Both are using lossless, no other edits have been made.

I’m not exactly sure what Affinity is doing to produce such small files, but I’ll have to look into it.

If you turn off the lossless option, and pick a quality of 96%, does that get the file size close to what Affinity does? 96% is visually indistinguishable from lossless, and I’m curious as to what it would do for your image.

-gus

Screenshot 2025-01-28 at 5.52.17 PM

Oh, it gets a similar result to Affinity with that settings