KCC

Kindle Comic Converter is an app that allows you to transform your PNG, JPG, GIF, CBZ, CBR and CB7 files into EPUB or MOBI format e-books. Preparing comics and manga for your E-Ink device was never easier.

KCC was initially developed for Kindle, but currently it outputs valid EPUB 3.0 and CBZ so despite its name, KCC is a tool that every E-Reader owner can happily use. Additionally, KCC will process your images and make sure that your comics and manga are fully optimized for E-Ink displays.

NOTE: For mobi support, download kindlegen_linux_2.6_i386_v2.9 and move the executable kindlegen to ~/.var/app/io.github.ciromattia.kcc/data/

Install Flatseal, a tool for managing permissions of applications installed via Flatpak. Use it to grant KCC the All system files permission.