Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian.

Manage, convert, sync, and more

• Library management. Calibre keeps things orderly by creating single entries for books that contains multiple formats. Add tags and comments for better searchability.
• Format conversion. Calibre's robust conversion options support a wide variety of file formats.
• File syncing. Calibre's device drivers seamlessly support all the top e-readers and devices.

What's New:

Version 9.4.0:

New features

• E-book viewer: Add "reading stats" to show reading progress.
• Edit book: Nicer UI for changing the entries in the insert tag menu.
• Cover grid: Option to draw emblems on top of cover in Preferences->Look & feel->Cover grid->Emblems.
• Cover grid: Add option to draw text flush with bottom of rendered cover.

Bug fixes

• DOCX Input: Fix paragraph/list margins in documents created by LibreOffice that do not have Word 2007 compatibility.
• ODT Input: Fix a regression in the previous release that broke conversion of images.
• Content server: When banning IPs for repeated login is enabled, only use the IP address not any HTTP headers as the ban key (CVE-2026-27824).
• Content server: Sanitize content disposition received as query parameter (CVE-2026-27810).

Improved news sources

• WIRED Daily.
• TOI Print Edition.

Screenshots:

• 
• 
•