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calibre

Open-source e-book library manager, format converter, viewer and editor

Open source (GPL-3.0-only) WindowsmacOSLinux

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0 · CLEAN

Just the program: no ads, no bundled offers, no account needed.

About

calibre is a free, open-source e-book manager created and maintained by Kovid Goyal. It organises large personal libraries with metadata and cover editing, tags, virtual libraries and detailed search. It converts between many e-book formats, including EPUB, AZW3, MOBI, DOCX and PDF, and sends books to e-readers over USB, wirelessly or by email. A built-in viewer reads books on the computer, and a full editor can modify EPUB and AZW3 files directly. calibre can also turn news websites into e-books using downloadable recipes, and its content server lets phones, tablets and other computers browse and read the library in a web browser. New versions are released frequently for Windows, macOS and Linux, and a portable Windows build is available for use from a USB drive.

Library management with metadata and cover editing
Converts between EPUB, AZW3, MOBI, PDF and more
Sends books to e-readers via USB, Wi-Fi or email
Built-in viewer and EPUB/AZW3 editor
Content server for reading in a browser

Before you download

Current builds need 64-bit Windows 10 (1809) or newer, or macOS 14 Sonoma or newer; older systems must use the older releases listed on the download pages.
There is no calibre app for phones or tablets; they connect over USB or through the browser-based content server.

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