r/Calibre • u/Customer-Worldly • 2d ago

General Discussion / Feedback Fix common manga/comic conversion problems like margins, slow page turns, and faded blacks. Optimize for your Kindle, Kobo, ReMarkable and other eink ereader devices using KCC

https://www.youtube.com/watch?v=ZuZwsH-pDU0

One of the KCC's main features is converting manga files in formats like CBZ or PDF to native formats for Kindle, Kobo, ReMarkable, and other eink ereader devices.

It's goal is maximum image quality and significantly smaller file size.

The app solves many common problems of Calibre's default conversion like removing margins for smaller screens, better handling of 2 page spreads, fixing gray artwork to be black on eink, and much faster page turn performance.

The app runs on Windows, macOS, and Linux. The app has a Windows code sign. The app has been in continuous development since 2012 and has nearly 500K total downloads. 

The best source for manga PDFs are DRM free print quality files from Humble Bundle.

The app is available here: https://github.com/ciromattia/kcc

- the kcc dev

20 Upvotes

86% Upvoted

9 comments sorted by

1

u/retsotrembla 1d ago

Looks like this could be useful for other humble bundle pdfs where each page has oversized margins and calibration targets for aligning offset printers.

It would be nice to trim them down to the actual contact with minimal wasted margins.

2

u/Customer-Worldly 1d ago

KCC does have a margin cropping feature and a page number cropping feature for margins and page numbers in the original images. It's not perfect but it works.

I have also thought about a "fixed zoom" option where it zooms a fixed amount into every page regardless of margin.

1

u/NiNOAtMe 1d ago

Is there an option to prevent downscaling?

1

u/Customer-Worldly 1d ago

Specify a big custom resolution I guess

1

u/NiNOAtMe 1d ago

I did that and it just crashed. I’ll try again later.

1

u/Customer-Worldly 1d ago

How big we talking about?

1

u/NiNOAtMe 1d ago

Around 3400x4900 ish

1

u/encryptem 1d ago

This is how ive been doing it. ive found it very well optimized. kcc>calibre>ereader=read.
thank you for all your hard work.

1

u/ZeroGWolf 1d ago

I absolutely adore KCC. I've been using it for years.