calibre logo calibre logo background glow

calibre

Manages, converts, and syncs e-book libraries across dozens of formats and reading devices, with built-in viewing and editing tools

It takes care to curate a safe software space. Help us do more.

&

+
Format Conversion
Converts e-books among dozens of formats including EPUB, MOBI, AZW3, PDF, and DOCX, allowing a single library to be read on almost any device.
+
Metadata Management
Downloads and edits book metadata such as title, author, cover, and tags from multiple online sources, keeping a library consistently organized and searchable.
+
Device Syncing
Syncs converted books to e-reader devices over USB or wirelessly and auto-selects the best format for each device, removing manual conversion steps before transfer.
+
Built-in E-book Viewer
Includes a viewer supporting table of contents, bookmarks, highlighting, and read-aloud narration, letting books be previewed and read without a separate app.
+
E-book Editor
Provides a built-in editor for EPUB and Kindle format books, enabling direct fixes to text, styling, and structure without external editing software.
+
News & Periodical Download
Fetches articles from hundreds of news sources or custom RSS feeds and packages them as e-books, letting periodicals be read offline on any reading device.
+
Content Server
Runs a built-in web server that exposes the library over a browser or as an installable PWA, allowing remote reading and management from phones and tablets.
+
Full Text Search
Indexes the complete text of every book in the library, so a word or phrase can be found across the entire collection rather than one book at a time.
+
AI Assistant Integration
Connects to AI providers including Anthropic, Google, and locally run models via Ollama or LM Studio, allowing readers to ask questions about a book’s content directly in the viewer.
...10 more features/limitations. Contact us to get a complete list of features and system requirements.

Platform

Desktop

Social

System Requirements

#Minimum
1
Windows 10, version 1809 or higher
#Minimum
1
macOS 14.0 (Sonoma) or higher
2
Apple Silicon or Intel (universal binary)
#Minimum
1
64-bit Intel or ARM64 compatible
2
GLIBC 2.34 or higher
3
libstdc++.so.6.0.30 (from GCC 11.4.0) or higher
Want to get access to entire data for training LLM or studying software or may be something else? Contact us at contact [at] softorage [dot] com
Want to get access to entire data for training LLM or studying software or may be something else? Contact us at contact [at] softorage [dot] com
Want to get access to entire data for training LLM or studying software or may be something else? Contact us at contact [at] softorage [dot] com
Want to get access to entire data for training LLM or studying software or may be something else? Contact us at contact [at] softorage [dot] com
Want to get access to entire data for training LLM or studying software or may be something else? Contact us at contact [at] softorage [dot] com

Ratings

Not available, but we appreciate help! You can help us improve this page by contacting us.

Developer

Written in

Python, C++, C

Initial Release

2006-10-31

Repository

License

Categories


Notes

Trivia:

  • calibre styles its own name in all lowercase (“calibre”), a deliberate branding choice by its creator rather than a typo, and is pronounced “cali-ber,” not “ca-libre.”