Software · Photo & graphics

Comicpress

Converts and compresses comics and manga for ereaders.

Completely free
Linux
Open source

Overview

File formats mentioned: PDF, CBZ, CBR and EPUB.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

At a glance

All of Comicpress is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

Comicpress takes DRM-free comic book files (CBR, CBZ, PDF) and compresses them to a fraction of their original size while improving how they look on e-ink ereaders. It applies image-processing operations such as contrast stretching, high-quality scaling, quantization, and dithering, all of which can be customized or disabled.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Last technical check: 8 November 2026
Description from Flathub — AppStream (Flathub)

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