calibre

Release: 8.9 [22 Aug, 2025]
New features
Annotations browser: Add a color swatch in the results list to make seeing the type of highlight easier
Closes tickets: 2109496
Match books in library window: When doing the initial search using the title of the book on the device, if no matches are found remove trailing text in parentheses or after a colon and try again
Closes tickets: 2117322
When merging books via drag and drop show the cover of the target book
Closes tickets: 2118371
HTMLZ Output: Add support for embedded fonts
Closes tickets: 2120726
Plugin installation window: Allow filtering available plugins by category
Fetch news: Add a sub-menu to the right click menu of the Fetch news button that shows recently downloaded news sources
Closes tickets: 2119557
Bug fixes
Edit book: When pasting text from the clipboard ensure it is normalized to NFC form
Closes tickets: 2099740
Content server viewer: Improve the selection dialog for choosing a Text-to-speech voice
Closes tickets: 2109789
Content server: Fix an error when editing a book's metadata to change both the cover and another field
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Release: 8.8 [08 Aug, 2025]
New features
E-book viewer: Improve display of Lookup results from Google
Kobo driver: Add support for latest Tolino firmware
Conversion: Handle -epub-text-emphasis properties used in some Japanese language EPUB books
Piper Neural text to speech engine: re-write the backend used to run the Piper speech models to no longer need an external binary for improved performance and robustness
Closes tickets: 2117433
Bug fixes
Edit book: Reports: Fix sorting by name of CSS rules
Fix template based custom column of tags type not being treated as multi valued when using it for similarity searches
Closes tickets: 2118744
When adding books recursively do not try to import folder whose names named with an ebook file extension. These are, for example, generated by Apple Books
EPUB3 Output: Fix various issues with processing nav files when they contain more than just the Table of Contents and are not included in the spine.
Closes tickets: 2117255, 2117336
Improved news sources
Economist
Press Information Bureau
Indian Express
Wall Street Journal
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Release: 8.7 [18 Jul, 2025]
New features
Kindle driver: Add support for generating page number files (APNX) on 2024 and newer MTP based Kindles
When finding similar books by author ignore "et al." suffix on author names
Closes tickets: 2116804
Bug fixes
Fix a regression in the previous release that broke configuring Sending of books to device
Closes tickets: 2116864
Kobo driver: Fix a regression that caused ancient, pre-Touch kobo devices to no longer work with calibre
Closes tickets: 2117113
MTP driver: Workaround for LibMTP no longer returning device serial numbers on some systems
Edit book: Fix the next/previous buttons in the Text search tool not working
Fix series and publisher mapping rules not handling commas correctly when downloading metadata one book at a time
Closes tickets: 2116065
Edit metadata dialog: When there are only a few cusotm comments like fields stretch them vertically to take up unused psace
Improved news sources
New York Magazine
World Archaeology
Minerva Magazine
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Release: 8.6 [10 Jul, 2025]
New features
Content server: Add a checkbox in content server user preferences to prevent a user account from changing its own password via the web interface
Restoring database: Improve performance by an order of magnitude
Add a tweak to Preferences->Tweaks to permit displaying the sort value for series in the Tag browser
Welcome wizard: Change default output format to AZW3 for Kindle as MOBI is obsolete and all Kindles released within the last decade plus support AZW3
Add 'Search "not in"' and 'Filter "not in'" buttons to Manage authors and Manage Items
Bug fixes
Windows: Fix a regression in the previous release that caused terminal windows to popup momentarily when adding PDF files or converting them
Closes tickets: 2115246
E-book viewer: Fix a regression in 8.4 that broke fading of the background image
Closes tickets: 2115057
Tag browser: Fix clicking on categories to search for books by first letter of series not working correctly for non-English language books
Closes tickets: 2116006
Edit metadata individually: Ensure Next/Previous buttons work even if something re-orders the books in the book list. They will now iterate over the books as they were at the time the dialog is created
Closes tickets: 2115111
Windows: Generate catalog: Workaround for systems where a broken antivirus or similar holds open files in the catalog library causing a permission denied error
Closes tickets: 2115084
New news sources
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Release: 8.5 [20 Jun, 2025]
New features
The scrollbars used in calibre in light mode are now the same style as the ones in dark mode, this improves the contrast making the scrollbar more accessible
Kobo driver: add an option to change the how the Kobo displays series numbers using a template.
Manage data files dialog: Add a button to cancel remaining books when managing multiple books
Closes tickets: 2112424
Kobo driver: add support for new Tolino firmware
Bug fixes
Prevent Windows 11 from starting a conhost.exe process for every calibre worker process
Closes tickets: 2111559
E-book viewer: Improve highlight grouping with recurring chapter names
When sending emails to amazon and pocketbook use random English text instead of UUIDs for subject/body.
Closes tickets: 2110400
Improved news sources
NYTimes
WSJ
Financial Times
Eenadu
Fokus.se
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Release: 8.4 [09 May, 2025]
KEPUB Output: Add an option to generate KEPUB files that have better text justification at the cost of gaps in highlighting when used on the Kobo
Closes tickets: 2107778
E-book viewer: Allow the background image specified in the Style section of the viewer preferences to extend under the page margins as well
Bug fixes
E-book viewer: Fix a regression that broke the "show book in main calibre program" link
Closes tickets: 2110117
News download: Fix Next/Previous links not working when the pointed to article failed to download
E-book viewer: Handle links to missing internal files with an error popup rather than becoming non-functional
E-book viewer: Fix some links not being processed correctly for very large EPUB files with many internal HTML files
Get books: Update ebooks.com plugin for website changes
Metadata review dialog: Fix merging of tags not working correctly
Wayland: Workaround Qt/Wayland bug that prevents the menu of the Layout button from showing
Closes tickets: 2109755
Prevent recursion when creating base temporary folder if something on system deletes the created temporary folder
Closes tickets: 2109612
New news sources
Frieze Magazine by Kabonix
Improved news sources
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Release: 8.3 [17 Apr, 2025]
New features
Cover grid: Allow configuring different backgrounds for light and dark mode in Preferences->Look & feel->Cover grid
E-book viewer: Further speedup first open of large EPUB files by another 30%
Metadata review dialog: Add merge comments action
Bug fixes
Kobo driver: Fix viewing of KEPUB files from the device view in calibre not working
Fix a regression in 8.1 that broke displaying of the debug log when running in debug mode
E-book viewer: Fix a regression in 8.0 that caused the clock to display an extra p after the time
Closes tickets: 2106280
Improved news sources
GoComics
Internazionale
New York Times
SCMP
The Hindu
Barrons

Release: 8.2.1 [04 Apr, 2025]

Release: 8.2 [04 Apr, 2025]
New features
Kobo driver: Add support for new Tolino firmware
Kindle driver: Allow using a value of * in Preferences->Output options->MOBI Output to have the driver mark all books sent to the device as personal documents
Bug fixes
Kobo driver: Fix hyphenation and extra CSS added to KEPUB files being ignored by the renderer on the Kobo
macOS: Fix opening book folder or PDF files for books with square brackets in the title not working
Closes tickets: 2105884
Quickview: Fix a long standing bug with syncing of columns in the presence of hidden/re-ordered columns
E-book viewer: Show an error message when an invalid nearby search expression is used
Closes tickets: 2104850
KEPUB Output: Fix incorrect encoding detection for some HTML files without an encoding declaration
Closes tickets: 2105424
macOS: Fix a regression in the previous release that caused failures in the E-book viewer when updating annotations for books with a large number of annotations
Version 8.2.1 fixes an error when clicking on format links in the book details panel
Closes tickets: 2106205
Improved news sources
The Economist
Reuters
Private eye

Release: 8.1.1 [28 Mar, 2025]
Version 8.1.1 fixes a regression causing an error that does not affect functionality on startup on macOS

Release: 8.1 [28 Mar, 2025]
New features
Edit metadata dialog: Allow right clicking on the cover to edit it with an external program
Closes tickets: 2103833
Virtual library tabs: When the tabs are locked prevent them from being re-ordered as well
Closes tickets: 2104325
FreeBSD: Add support for connecting to devices, contributed by Guido Falsi
Bug fixes
macOS: Fix regression in previous release that caused calibre:// URLs to no longer work
Closes tickets: 2103949
macOS: Fix a regression in calibre 8 that prevented icons in menus from being rendered
Closes tickets: 2103777
Kobo driver: Fix hyphenation settings not being applied correctly when generating KEPUB to put on the device
KEPUB Output: Include leading whitespace in kobo sentence span tags. This prevents unsightly breaks when highlighting across formatted text on the Kobo
Closes tickets: 2103926
Content server: Fix FB2 books not readable via the in-browser viewer
Closes tickets: 2103846
Edit book: Add text narration: Fix preferred voice for language setting being ignored
E-book viewer: Use IPC to update annotations when calibre is running. Avoids possible loss of annotations in the Annotations browser due to db being locked
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