# psiegman/epublib

a java library for reading and writing epub files

Repository: https://github.com/psiegman/epublib
Canonical: https://ross.abutalabs.com/products/epublib
Homepage: http://www.siegmann.nl/epublib
Language: Java
License Family: other
Last push: 2024-01-19T13:38:57+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 6132, "days_push": 957, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1123, forks 329 (observed 2026-08-28T04:03:40.173169+00:00)

## What it is
Epublib is a Java library for reading, writing, and manipulating EPUB ebook files, with a core that runs on both standard JVM and Android. It also ships command-line tools for tasks like setting metadata or cover images, converting HTML to EPUB, and a Swing-based EPUB viewer.

## Use cases
- read and parse epub files in java
- create epub ebooks programmatically
- convert html files to epub
- edit epub metadata like author or cover image
- build an android ebook reader app
- clean up non-compliant epub files

## When to choose
- you need to read, write, or fix EPUB files from Java or Android code
- you want a simple API for ebook metadata, spine, and table of contents
- you need command-line tooling to batch-edit epubs

## When to avoid
- you work outside the JVM ecosystem
- you need a full-featured ebook reader UI rather than a library
- you need actively developed support for the latest EPUB 3 features

## Facets
- artifact type: library
- maturity: maintenance
- function: parser, pdf, cli
- domain: files, developer-tools, cross-platform
- platform: jvm, cli
- tags: epub, ebook, java-library, swing-viewer, html-to-epub, android

## Member repositories
- psiegman/epublib (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:40.173169+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:40:53.476190+00:00, confidence not recorded.
  - readme: https://github.com/psiegman/epublib (fetched 2026-08-28T04:03:40.173169+00:00, sha 6fd9b101644c)
  - homepage: http://www.siegmann.nl/epublib (fetched 2026-08-29T12:44:21.458321+00:00, sha 792cb3b43aa2)
  - site_page: http://www.siegmann.nl/epublib/apidocs (fetched 2026-08-29T12:44:21.467510+00:00, sha 7aa56baaa648)
  - site_page: http://www.siegmann.nl/epublib/getting-started (fetched 2026-08-29T12:44:21.471340+00:00, sha d7d694c60d2f)
  - site_page: http://www.siegmann.nl/epublib/faq (fetched 2026-08-29T12:44:21.469328+00:00, sha bc6028197063)
- Data as of 2026-08-30T08:39:29.467469+00:00.