Skip to content
NERDS.xyz
  • Home
  • AI
  • Linux
  • Open Source
  • Hardware
  • Security
  • All Articles
  • RSS
calibre

Calibre 8.15 update lands with helpful ebook improvements

November 21, 2025 by Brian Fagioli

Calibre just pushed out version 8.15! While this one is more of a tidy-up release, it still brings a few welcome touches for anyone who lives inside this essential open source ebook manager.

The headline change is in the ebook viewer. Highlights now show their date inside the tooltip when you hover over them. It sounds small, but if you read a lot of technical material, novels, or PDFs scattered across a big archive, it becomes surprisingly useful to know exactly when you marked something. That extra context can help you trace your own thinking across multiple books.

The comments editor also gets smarter. When you change the case of selected text, Calibre now tries to preserve as much formatting as possible so you do not lose structure while cleaning things up. There are also new keyboard shortcuts for case changes. You can select text, right click, and see the case change menu with its shortcut hints. These kinds of quality-of-life tweaks matter when you edit metadata regularly.

On the bug fix side, Calibre tightens up several lingering issues. Editing the book list is now more stable, especially when a title gets auto-added in the background right while you are in mid-edit. The HTML syntax highlighter in the book editor had a memory leak that is now resolved. And the calibredb list command once again shows identifier values correctly, which is important for people who rely on command-line automation.

Calibre’s news system also expands. There is a new source for Hack a Day curated by Rui Rebelo, plus improvements to the Guardian feed. These integrations are always a nice bonus since they turn Calibre into more than just a library tool.

☕

Support independent tech journalism

NERDS.xyz is independently owned and operated. If you enjoy my coverage of Linux, AI, hardware, cybersecurity, and tech culture, consider supporting the site on Ko-fi.

Support NERDS.xyz
Avatar of Brian Fagioli
Written by

Brian Fagioli ✔

Technology journalist and founder of NERDS.xyz

Brian Fagioli is a technology journalist and founder of NERDS.xyz. A former BetaNews writer, he has spent over a decade covering Linux, hardware, software, cybersecurity, and AI with a no nonsense approach for real nerds.

📄 More by Brian Fagioli ✖ Follow on X ▶ YouTube @ Threads 🐘 Mastodon
Categories ebook Tags Calibre, Calibre 8.15, ebook manager, ebook tools, ebook viewer, Linux, metadata editor, Open Source, update
HTC VIVERSE and Wonderland Engine team up to boost open source 3D creation
GeForce NOW Fast Pass gives Chromebook users a smoother way to stream PC games
Add us to
Google
Add

NERDS.xyz
Newsletter

Join
⚡
Support
NERDS
Enjoying NERDS.xyz?
Send a Lightning tip.

Featured Articles

  • Sovereign AI sounds independent until you notice everything still runs on NVIDIA
  • Q&A: Ditto says social media became sterile and the internet should be fun again
  • Tim Cook is stepping down and Apple desperately needs this reset
  • Joanna Stern’s exit from The Wall Street Journal is a shock, and a sign of the times
  • Stop paying TurboTax when IRS Free File covers most taxpayers for FREE
© 2026
NERDS.xyz
All rights reserved
About Contact Privacy Policy Editorial Policy
© 2026 NERDS.xyz • Built with GeneratePress