KFX to epub conversion via Calibre?

angel44e · Yesterday, 04:20 AM

Hello! I just don't know where to ask that question ( so many topics there are ) or is there any similar problem.

I usually convert from KFX files ( my kindle amazon boooks ) to epub and pdf files . And I don't change anything in settings ( just leave them as default ) and they are converted normally and fully readable files till now.

But one book that I've converted in that way taken too much time to convert ( from 10MB KFX file ) and output files are too large - 89 MB epub and 113 MB pdf. PDF file text is small and I should quite zoom pages so to be readable and epub file text is too small and not readable at all.

Is it depends on metadata of book or should be change some settings of input/output file?

How could I solve that problem? Any help appreciated

JSWolf · Yesterday, 10:10 AM

Open the ePub in the calibre editor and have a look at the code. You should be able to fix the font size problem.

angel44e · Yesterday, 11:57 AM

Quote:

Originally Posted by JSWolf

Open the ePub in the calibre editor and have a look at the code. You should be able to fix the font size problem.

Thanks! I've seen so many options to check and to change!

And there are 2 or 3 for fonts.I've asked ChatGPT,but it didn't help me at all.

I've done all settings as AI adviced,but result is same as my previous converted epub.

And I don't know what and where to change in editor

Yesterday, 04:20 AM	#1
angel44e Member Posts: 11 Karma: 110 Join Date: Feb 2025 Device: kindle android	KFX to epub conversion via Calibre? Hello! I just don't know where to ask that question ( so many topics there are ) or is there any similar problem. I usually convert from KFX files ( my kindle amazon boooks ) to epub and pdf files . And I don't change anything in settings ( just leave them as default ) and they are converted normally and fully readable files till now. But one book that I've converted in that way taken too much time to convert ( from 10MB KFX file ) and output files are too large - 89 MB epub and 113 MB pdf. PDF file text is small and I should quite zoom pages so to be readable and epub file text is too small and not readable at all. Is it depends on metadata of book or should be change some settings of input/output file? How could I solve that problem? Any help appreciated Last edited by angel44e; Yesterday at 08:24 AM.

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Yesterday, 10:10 AM	#2
JSWolf Resident Curmudgeon Posts: 80,544 Karma: 150249619 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Open the ePub in the calibre editor and have a look at the code. You should be able to fix the font size problem.

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