calibre

Release: 9.6 [27 Mar, 2026]
New features
Full text search: A new cards based view of full text search results with book covers
To perform a full text search, click the "FT" button on the left of the search bar. The old compact result view can be re-activated by clicking the button to the left of the search bar in the Full text search window.
A new "word-prefix" completion mode that shows matches that have any word starting with the typed in letters
Closes tickets: 2144422
Bookshelves: Add option to have the height of books be constant per group
Edit book: File list: Allow using Ctrl+Left/Right to move an item to top/bottom of the list
Bug fixes
Fix notes being lost when changing the lookup name of custom column
Closes tickets: 2146404
E-book viewer: Fix using the slower/faster buttons causing a chapter skip when using the Piper neural speech backend
Content server viewer: Fix annotations being not synced to the server in some Android devices when using the Firefox browser
Windows: Force kill calibre.exe on quit to workaround hang in interpreter shutdown on some systems
TXT Output: Fix asciiize option not applying to generated inline Table of Contents
E-book viewer: Disallow background images from the internet. This was an unused feature anyway (CVE-2026-33205)
TXT Input: Ensure resource files are read only from book contents (CVE-2026-33206)
Only apply changes to text fields in the book list when the new value is different from the old
Closes tickets: 2144489
(省略されました)

Release: 9.5 [13 Mar, 2026]
New features
Allow creating a column to display reading progress
Closes tickets: 2142135
Reading progress comes from the calibre E-book viewer. To create the column, go to Preferences->Add your own columns, click the plus button and finally click on the "Read progress" link.
Annotations browser: Allow filtering by highlight style
E-book viewer: Add an option to display the pages from the paper book page list (when available) while also showing the last page number
Closes tickets: 2142728
Edit book: Add a tool to remove unused images, similar to the tool to remove unused CSS
Tolino driver: support new firmware version
E-book viewer: Add a reset button to the reading stats panel
Bug fixes
Fix overridden icons from config directory not switching between dark/light variants on theme change
Closes tickets: 2143063
Fix: Use MOBI fallback for KFX format when downloading news periodicals
Edit book: Restore focus to editor after showing search count popup message
Fix a bug in KEPUB markup removal when there are empty kobo spans
RB Input: Ensure files are extracted within container dir (CVE-2026-30853)
Book list: Fix ctrl+shift+arrow key not moving the currently selected book. Fixes #2142950
(省略されました)

Release: 9.4 [27 Feb, 2026]
New features
E-book viewer: Add "reading stats" to show reading progress
Closes tickets: 2142715
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
Closes tickets: 2142611
ODT Input: Fix a regression in the previous release that broke conversion of images
Closes tickets: 2142345
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

Release: 9.3.1 [20 Feb, 2026]
Version 9.3.1 fixes a regression in the previous release that caused a spurious error message to show when merging books and a regression in calibre 9.0 that broke using textures as the Cover grid background when using the system theme on Windows
Closes tickets: 2142318, 212296

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
(省略されました)

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
(省略されました)

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
(省略されました)

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
(省略されました)

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]