Mobileread
pdf conversion that preserves quality, paperwhite
#1  charsee 10-29-2020, 05:00 PM
Hi newbie here, I received my paperwhite today. I'd bookmarked this forum and the day has come. I managed to sneak few pdfs into kindle via USB. I was wondering if you could share with me your methods and workaround for certain problems.
1) pdf quality in paperwhite is agonizing, i converted them to epub and pages would either show low quality images or some random ascii texts for equations
2) I remember seeing a pdf splitter that splits one page into 2, maybe I could boost pdf quality by this way by skipping the entire conversion to mobi ordeal. I'm planning to convert files on pc, is there a suitable software or online tool that can help this?
3) Is there a sync server which is not linked to amazon, where you can upload files in server and sync it to kindle? Or is there a way to transfer files via WIFI from calibre to kindle? Or is there any other method that uses wifi to transfer files from pc to kindle?
I appreciate your time, thank you
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#2  jhowell 10-29-2020, 05:43 PM
Quote charsee
2) I remember seeing a pdf splitter that splits one page into 2, maybe I could boost pdf quality by this way by skipping the entire conversion to mobi ordeal. I'm planning to convert files on pc, is there a suitable software or online tool that can help this?
See the thread: k2pdfopt: optimizes PDFs for viewing on e-readers
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#3  charsee 10-29-2020, 06:03 PM
Quote jhowell
See the thread: k2pdfopt: optimizes PDFs for viewing on e-readers
thanks a bunch
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#4  Quoth 10-30-2020, 12:29 PM
PDFs, unless A5 format, need either paper, laptop or a Tablet. A small subset work on 300 dpi eink 6" models. The 7" models are a bit better.

Sometimes reconversion or cropping or colour depth or brightness/contrast helps using The Gimp (import to set DPI and export in reverse order as mng file) and ImageMagick (mng to pdf with crop and bit depth and brightness/contrast) or use K2pdfopt
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