calibre

Release: 9.3 [20 Feb, 2026]
New features
Windows installer: Detect running calibre processes and ask user to shutdown calibre before proceeding with installation to avoid reboots post installation
Improve Preferences->Tweaks getting rid of the need for double apply
KEPUB Output: When converting to KEPUB preserve cover aspect ratio regardless of the setting for it in the EPUB Output to match the behavior of KEPUB files from Kobo
Closes tickets: 2141251
Bug fixes
Make the new pages column value available in save to disk/send to device templates
Closes tickets: 2141151
Hanvon N10 device driver: Fix calibre unable to put its metadata files onto the device
Closes tickets: 2141625
Amazon metadata download plugin: Fix incorrect series index from amazon.com
Fix a regression in calibre 9.0 that broke output to PDB/TCR/zTXT files
Closes tickets: 2142195
Windows: Fix calibre not exiting on quit when the wireless device driver is used in calibre 9
Closes tickets: 2141994
Fix error in page counting when using the calibredb command to add a book
Completion: When sorting completion matches in contains mode ensure matches are sorted first by distance from beginning and then sub-sorted alphabetically
Closes tickets: 2141170
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Release: 9.2.1 [06 Feb, 2026]
Version 9.2.1 prevents the Content server from using template based searches since this is insecure when the content server is used with un-authenticated users
Closes tickets: 2140769

Release: 9.2 [06 Feb, 2026]
New features
ZIP Output: Change the template engine used for HTML templating from templite to Mustache, for greater safety and performance. Note that this is a breaking change if you use custom templates with ZIP output (CVE-2026-25731)
Check library: Add an option to rebuild the annotations search index
Closes tickets: 2139555
Bug fixes
CHM Input: Ignore internal files that have paths that end up outside the container. Prevents path traversal attacks with malicious CHM files (CVE-2026-25635)
EPUB Input: Ensure font obfuscation processing happens only on files from the EPUB, preventing path traversal attacks from malicious EPUB files (CVE-2026-25636)
Windows: Workaround for bug in Qt 6.10 causing Read Aloud in the E-book viewer to crash when stopped and restarted
Closes tickets: 2139521
Fix drag and drop of books into bookshelf view not working
Closes tickets: 2139529
Bookshelf: Fix bookshelf view blank on some macOS systems
Closes tickets: 2139403
E-book viewer: Fix a regression in calibre 9.0 that broke the Go to page function
Closes tickets: 2139576
E-book viewer: Fix google dictionary lookup results not legible
Closes tickets: 2140541
E-book viewer: Fix PageUp/PageDown keys needing to be pressed repeatedly at internal HTML file boundaries in flow mode
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Release: 9.1 [31 Jan, 2026]
New features
This is a pure bugfix release fixing various regressions in calibre 9.0
Bug fixes
macOS: Fix crash when pasting cover image
Closes tickets: 2139397
Fix restore database not working
Closes tickets: 2139455
Windows: Fix the Read Aloud feature in the E-book viewer not working when using the Piper engine
Closes tickets: 2139399
Fix using icon themes in "For dark and light" mode not working
Closes tickets: 2139454
Fix covers in the Cover grid slightly stretched on high DPI screens
Amazon metadata download: Fix publication date not being retrieved form amazon.co.jp
Closes tickets: 2139414
Improved news sources
Economist
A new Bookshelf view with your books arranged on shelves showing their spines
Viewer: Add an "Edit book" button to the viewer controls to edit the current book
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See what's new in calibre 9.0
Release: 9.0 [30 Jan, 2026]
New features
A new Bookshelf view with your books arranged on shelves showing their spines.
Click the Layout button in the bottom right corner of the calibre window to switch to Bookshelf view.
Viewer: Add an "Edit book" button to the viewer controls to edit the current book when the current book is in an editable format such as EPUB, AZW3 or KEPUB. It opens the editor at the approximate location that is currently being viewed.
Linux: Add momentum based scrolling for the book list when using high resolution scroll devices like touchpads
TXT Output: Add an option to replace images by their alt attribute text
Closes tickets: 2137504
EPUB: Support reading cover images from so called "Open Manga Format" non-conformant EPUB files produced by some Japanese publishers.
Add a tweak to change the font size of the AI chat widget
Closes tickets: 2138862
E-book viewer: Allow typing in a page number to go to instead of forcing the user to scroll through existing page numbers
Kobo driver: Support for updated firmware
Bug fixes
KEPUB Output: Add some CSS to fix rendering of tate-chu-yoko text on Kobo devices
Only show the Sort button on the search bar if the Sort By action has not been added to the search bar by the user
Closes tickets: 2138770
EPUB3 metadata: Handle identifiers that use HTTP URLs without the url: prefix
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Release: 8.16.2 [04 Dec, 2025]
Fix a crash in 8.16.0 that caused using the "Close" button in Ask AI to crash calibre on some systems
Closes tickets: 2133992
Allow asking AI questions about any book in your calibre library. Right click the "View" button and choose "Discuss selected book(s) with AI" [8.16.2]

Release: 8.16.1 [04 Dec, 2025]
Fix a bug in 8.16.0 that prevented the Ask AI what to read next feature from working
Closes tickets: 2133932
Allow asking AI questions about any book in your calibre library. Right click the "View" button and choose "Discuss selected book(s) with AI" [8.16.1]

Release: 8.16 [04 Dec, 2025]
New features
Allow asking AI questions about any book in your calibre library. Right click the "View" button and choose "Discuss selected book(s) with AI"
AI: Allow asking AI what book to read next by right clicking on a book and using the "Similar books" menu
AI: Add a new backend for "LM Studio" which allows running various AI models locally
Bug fixes
Use a named local timezone for better display of historical dates in the local timezone
Closes tickets: 2133435
PDF Input: Fix a regression in the new PDF input engine that caused HTML markup to not be always escaped
Closes tickets: 2133846
Get books: Update amazon.it store plugin
Closes tickets: 2132253
Fix addition of format specific options when using calibredb catalog with command line flags
calibredb catalog: Fix generation of language field in BiBTeX catalogs
Closes tickets: 2133134
Fix incorrect series index when downloading metadata from amazon.co.jp
Closes tickets: 2132182
Fix a regression in the previous release that caused the case change menu to not be present in the comments editor.
calibredb list: Fix identifier values not being shown
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Release: 8.15 [21 Nov, 2025]
New features
E-book viewer: Highlights panel: Show the date for highlights in the tooltip when hovering over a highlight
Closes tickets: 2131619
Comments editor: When changing case preserve as much text formatting as feasible
Comments editor: Add shortcuts for case change operations. Select some text, right click and see the case change menu for the shortcuts
Closes tickets: 2131158
Bug fixes
Editing book list: Be robust against the book list changing in the background when a book is auto added or similar while a cell is being edited
Closes tickets: 2131622
Edit book: Fix a memory leak in the HTML syntax highlighter
Closes tickets: 2130880
calibredb list: Fix identifier values not being shown. Fixes #2131557
New news sources
Hack a Day by Rui Rebelo
Improved news sources
Guardian

Release: 8.14 [07 Nov, 2025]
New features
Tolino driver: Add support for latest firmware
When showing completions for languages show all languages that contain the typed in string instead of only languages that start with the typed in string
Closes tickets: 2130804
When showing completions in substring match mode, order the completions by how close to the start the query is
A new shortcut Ctrl+Alt+Shift+P to switch to the previously applied Virtual library
Closes tickets: 2127819
Bug fixes
FB2 Input: Fix a remote code execution vulnerability from maliciously crafted FB2 files
Closes tickets: 2130764
E-book viewer: Ignore soft hyphens when looking up words
Closes tickets: 2130603
Catalog export: Fix export of languages in BibTeX format
Closes tickets: 2130573
Windows: Fix Open With not working with Microsoft Paint
Closes tickets: 2128853
Improved news sources
Harper's Magazine
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Release: 8.13 [18 Oct, 2025]
New features
Virtual libraries: Allow defining their search expressions more comfortably in a multi-line edit box
Closes tickets: 2126881
Open with: On Windows launch the specified program via the windows API for executing programs to decouple it more thoroughly from the calibre environment
Bug fixes
Get books: Fix ebooks.com plugin
calibre-server: Fix CALIBRE_OVERRIDE_DATABASE_PATH not working
Export library: Dont use /tmp on Linux fixes export breaking with large FTS database on Linux distros that mount /tmp in RAM
Fix a regression in 8.11 that caused errors when trying to open a book from the full text search results while the search was still running
Closes tickets: 2126611
Improved news sources
Todoist
NZZ