KCC

Most manga conversion methods for ereaders add margins. But KCC enables true fullscreen from top to bottom.

(feat. Ya Boy Kongming! and Fire Force from a Humble Bundle (opens in a new tab) PDF source.)

Kindle Comic Converter optimizes black & white (or color) comics and manga for E-ink ereaders like Kindle, Kobo, ReMarkable, and more. Pages display in fullscreen without margins, with proper fixed layout support. KCC runs on Windows, macOS, and Linux.

Supported input formats include JPG/PNG image files in folders, archives like CBZ/EPUB, or PDF.

Supported output formats include MOBI/AZW3, EPUB, KEPUB, CBZ, PDF, and folders of images.

The absolute highest quality source files are DRM-free PDFs from Humble Bundle (opens in a new tab)/Fanatical. The PDFs are often x12000 resolution or better, while even the 10" Kindle Scribe is only x2480.

KCC's main goal is maximum image quality at significantly smaller file size. For example, KCC

1) can compress a 600 MB manga volume from Humble Bundle to 100 MB. This is mostly accomplished by downscaling to the native resolution of your specific device. This can also improve battery life, page turn speed, and general performance on underpowered ereaders with small memory and storage capacities.

2) fixes black levels to avoid gray/faded blacks found in many Kindle Store manga. (The original source was gray, KCC processing made it black.)

3) fixes the rainbow effect on Kaleido 3 color eink (opens in a new tab) without blur using a 2D Discrete Fourier Transform:

4) can semi-automatically detect 2-page spreads (opens in a new tab) from pre-split single pages:

You can view combined spreads either rotated or not:

You can view the split halves either before or after combined spreads:

Demo

Just drop your input files into the KCC window, hit convert, and USB drop the output files onto your device's documents folder!

There are a lot of options, but most people only care about the ones checked above.

Hover over each option to see details in a tooltip.

NOTE: some checkboxes can have a half-check marks.

Then all your usb loaded comic files will show up next to all your normal books in your ereader library!