kovidgoyal

    kovidgoyal/calibre

    #327 this week

    The official source code repository for the calibre ebook manager

    backend
    calibre
    ebook
    ebook-formats
    ebook-manager
    ebook-reader
    Python
    GPL-3.0
    25.9K stars
    2.7K forks
    25.9K GitHub watchers
    Updated 9/18/2026
    View on GitHub

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    Use Cases & Benefits

    • Manages, views, converts, edits, and catalogs e-books across major formats while syncing with e-book reader devices.
    • Offers a comprehensive, cross-platform solution integrating e-book management, metadata fetching, and format conversion in one tool.
    • Use for organizing and converting personal e-book collections across devices and formats on Linux, Windows, or macOS.
    • Use for automating newspaper downloads and converting them into e-book formats for convenient offline reading.
    • Use for developers or contributors aiming to extend or customize e-book management features using its Python-based source code.

    About calibre

    calibre

    calibre is an e-book manager. It can view, convert, edit and catalog e-books in all of the major e-book formats. It can also talk to e-book reader devices. It can go out to the internet and fetch metadata for your books. It can download newspapers and convert them into e-books for convenient reading. It is cross platform, running on Linux, Windows and macOS.

    For more information, see the calibre About page.

    Build Status

    Screenshots

    Screenshots page

    Usage

    See the User Manual.

    Development

    Setting up a development environment for calibre.

    A tarball of the source code for the current calibre release.

    Bugs

    Bug reports and feature requests should be made in the calibre bug tracker at Launchpad. GitHub is only used for code hosting and pull requests.

    Support calibre

    calibre is a result of the efforts of many volunteers from all over the world. If you find it useful, please consider contributing to support its development. Donate to support calibre development.

    Building calibre binaries

    See Build instructions for instructions on how to build the calibre binaries and installers for all the platforms calibre supports.

    calibre package versions in various repositories

    Packaging Status

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