IF YOU HAVE THOUSANDS OF E-BOOKS, THIS PROGRAM IS A MUST! Manage Your Library on Computer

Caliber is a free and open source library program developed for managing electronic books.

Can work with PDF, EPUB, MOBI and many different e-book formats.

Books:

• Author
• Type
• Label
• Series
• Publisher
• Date

.

It is also possible to convert book formats to each other.

For example, you can convert the EPUB file to another format suitable for a different e-book device.

One of the current versions of Caliber 9.15, released September 18, 2026. Interestingly, this version includes an optional “Create your own adventure” artificial intelligence feature has also been added. This feature was developed to test AI backends and can be additionally enabled by the user. Caliber

There are also improvements on Caliber's content server side, such as a modern interface and the ability to be installed as a PWA over HTTPS. Caliber

What does it do?

It allows you to keep your e-book collection organized on the computer and transfer it to different devices.