# grimmory-tools/grimmory

A self-hosted library for your ebooks, comics, and audiobooks

Repository: https://github.com/grimmory-tools/grimmory
Canonical: https://ross.abutalabs.com/products/grimmory
Homepage: https://grimmory.org
Language: Java
License: AGPL-3.0
License Family: copyleft
Topics: angular, azw3, cbr, cbz, comics, comics-reader, documents, ebooks, epub, java, metadata, mobi, oidc, opds, pdf, self-hosted, spring-boot, ebooks-reader
Last push: 2026-08-25T03:01:10+00:00

## Health v2 (maintenance only)
Score: 82/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 12
- inputs: {"age_days": 174, "days_push": 8, "days_rel": 11, "gap_med": 2.5, "n_releases_24m": 21}
- flags: young
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4070, forks 302 (observed 2026-08-28T04:08:34.130769+00:00)

## What it is
Grimmory is a self-hosted digital library server for ebooks, comics, documents, and audiobooks, deployed via Docker with a web-based interface. It offers metadata enrichment, an in-browser reader, multi-user support with OIDC, OPDS/Kobo/KOReader sync, and automatic import via a watched BookDrop folder.

## Use cases
- self-host my ebook collection with a web reader
- manage and read comics (CBZ/CBR) in the browser
- sync reading progress to my Kobo or KOReader
- serve my library to mobile apps over OPDS
- automatically import new books from a watched folder
- send books to my Kindle via email
- share a library with multiple users and per-user progress
- fetch covers and metadata from Google Books and Open Library

## When to choose
- you want a single self-hosted app for ebooks, comics, and audiobooks
- you need OPDS, Kobo, and KOReader integration
- you want multi-user libraries with OIDC authentication
- you prefer automatic metadata lookup and rule-based smart shelves

## When to avoid
- you only need a lightweight Calibre alternative without a server
- you need DRM-protected store books to work
- you cannot run Docker or a MariaDB database
- you need music or video media management rather than books

## Facets
- artifact type: application
- maturity: active
- function: self-hosted, search-engine, file-upload, web-framework
- domain: self-hosted, files, pdf, media, developer-tools
- platform: self-hosted, cross-platform
- tags: ebook-library, comics-reader, audiobooks, opds, kobo-sync, koreader, booklore-fork, kindle-send, bookdrop, oidc-auth, metadata, docker, web-server

## Member repositories
- grimmory-tools/grimmory (main) score 82

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:34.130769+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 2026-08-29T18:23:30.501062+00:00, confidence not recorded.
  - readme: https://github.com/grimmory-tools/grimmory (fetched 2026-08-28T04:08:34.130769+00:00, sha a45db35a3b9a)
  - homepage: https://grimmory.org (fetched 2026-08-29T09:15:30.706796+00:00, sha 4b658ef546d2)
  - site_page: https://grimmory.org/docs/getting-started (fetched 2026-08-29T09:15:30.715694+00:00, sha e12508028b32)
- Data as of 2026-08-30T08:39:29.467469+00:00.