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maddz · 02-15-2025, 12:24 PM

I'm finding the compression changing epub3 to epub2 in v7.25 isn't working. I downloaded a 20 MB epub3 book from Kobo and ran it through the converter. No difference in file size - if anything, a little larger. I managed to get it to 16 MB by compressing the illustrations (b/w line art). Then I ran it using 3.48 on an older machine - it shrank to 3.42 MB with (as far as I can see) no loss in image quality.

Both versions are outputting to epub2. What's the difference?

02-15-2025, 12:24 PM	#1
maddz Wizard Posts: 1,403 Karma: 30039536 Join Date: Mar 2010 Location: UK Device: Kobo Forma, Icarus, iPad Mini 2, Kobo Touch, Google Nexus 7	EPUB3 to EPUB2 Compression issues I'm finding the compression changing epub3 to epub2 in v7.25 isn't working. I downloaded a 20 MB epub3 book from Kobo and ran it through the converter. No difference in file size - if anything, a little larger. I managed to get it to 16 MB by compressing the illustrations (b/w line art). Then I ran it using 3.48 on an older machine - it shrank to 3.42 MB with (as far as I can see) no loss in image quality. Both versions are outputting to epub2. What's the difference?