JXL is a pretty good extension. I'd pronounce it "jixel" to rhyme with pixel. JPEG-Eon, or JPEG-Era might have given the impression of "long-term"? Jeon is a K

JXL is a pretty good extension. I'd pronounce it "jixel" to rhyme with pixel. JPEG-Eon, or JPEG-Era might have given the impression of "long-term"? Jeon is a Korean fritter, which I like the sound of. I don't think you could have Jera without causing a clash with Jira for some vowel pronunciations?? JPEG-NX, JPEG-Next, would have been good, .jnx, "jinx", ... Or, how about just JPEN, for JPEG-New? Honestly, if it's also for non-photographic images then a break from even using "JPEG" would be useful in not weighing the format down with that baggage. I too thought it was likely optimised for very large [photographic] images.