Calibre-Web is a web application for browsing, reading, and downloading eBooks stored in a Calibre database.
The tool solves the problem of accessing an eBook library through a modern web interface rather than relying on Calibre's desktop application. It works by connecting to an existing Calibre database and presenting its contents through a responsive Bootstrap-based interface. Users can browse their collection, read eBooks directly in the browser for multiple formats, download books, and manage metadata without leaving the web application.
Calibre-Web suits anyone who wants to share an eBook library across devices or provide remote access to a Calibre collection. It works well for personal libraries, small institutional collections, or shared family reading systems. The tool includes fine-grained user permission controls, making it suitable for multi-user deployments. Key distinguishing features include in-browser reading support, the ability to send eBooks to e-readers with one click, Kobo device synchronization, eBook conversion through Calibre binaries, and support for multiple authentication methods including LDAP and OAuth. The application also supports custom book collections, metadata editing, and content filtering based on user permissions.
The project maintains active engagement with its user base, with almost all open issues originating from outside users rather than the core team, indicating substantial real-world adoption. Maintainers typically respond to new issues and pull requests within a few days. Work in the issue tracker centers on bug fixes, questions from users, and items marked as fixed in nightly builds.
