How To Instantly Convert Any eBook Format And Organize A Digital Library

How To Instantly Convert Any eBook Format And Organize A Digital Library

Unlock a powerful but lesser-known method to prepare any eBook format and organize your digital library like a pro—without breaking a sweat. This rare technique involves the seamless combination of two open-source tools: Calibre and Karellen.


:small_blue_diamond: Step 1: Install Calibre
Calibre is the gold standard for eBook management. Download it from here. It supports a wide range of formats and devices.

:small_blue_diamond: Step 2: Use Karellen to Prepare Books
Karellen is a script that processes downloaded books and adds metadata, cover art, and series info, then imports them cleanly into Calibre. It’s available at this GitLab repo.

To use Karellen effectively:

  • Follow the install instructions in the GitLab README.
  • Organize your downloads into folders before running Karellen for best results.

:small_blue_diamond: Step 3: Automate Import and Metadata Cleanup
Once books are prepped, Calibre can automatically add them to your library. Configure “Auto Add” to watch your Karellen output directory.

:small_blue_diamond: Optional Tip: Use Plugboards and Virtual Libraries
Enhance your experience by setting up Calibre plugboards and virtual libraries to auto-tag, sort by series, or send to devices.


This strategy makes managing even the largest eBook collections fast, clean, and automated. Perfect for digital archivists, eBook enthusiasts, or anyone tired of manually fixing metadata.

Happy learning!

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Hi apparenty Karellen repo does not exist. Please confirm…

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I’m curious also… have checked various times.

https://github.com/karellen

https://github.com/karellen/karellen-sysbox

https://openhub.net/p/karellen/enlistments

That’s it, relatable maximum, i hope this helps!

Thank you!

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