calibre Changelog
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Changes in the last ten calibre releasesen-use-bookssoftwarecalibreFri, 28 Aug 2026 13:34:52 -0000calibre 9.14
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Fri, 28 Aug 2026 08:00:00 +0530calibre-9.14<div><h2>New Features</h2><ul>
<li>Allow generating book covers using AI with different cover styles such as romance, sci-fi, pulp fiction etc.</li>
<li>Edit book: File browser: When hovering the mouse over an image file show a floating preview of the image next to the file browser</li>
<li>Tags editor: have searching ignore accents</li>
<li>AI: Add Anthropic and Grok backends for Claude and Grok models</li>
<li>AI: Remove GitHub backend as service has been discontinued</li>
<li>Edit metadata dialog: Always scale up cover preview to fill available space while maintaining aspect ratio</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>Content server: OPDS: Fix a regression that caused first line of comments to be missing</li>
<li>Undo delete books: Show a progress bar when more than five books have to be undeleted</li>
<li>Linux: Binary builds: Fix hyperlinks in labels not working on some Linux systems</li>
<li>Get books: Fix a regression that broke show in store</li>
<li>Fix cover images with empty EXIF records not showing on Kindle lockscreen</li>
<li>Fix a regression in 9.11 that broke configuring the Folder device driver</li>
<li>Google AI: Fix the checkbox to allow search grounding invisible in the config dialog</li>
<li>Fix a regression in 9.11 that broke reading metadata from HTML files in builds of calibre with Python runtime assertions enabled</li>
<li>Edit book: Jump to class: Fix @charset rule causing jump to class to be off-by-one because it uses tiny css which ignores chaset rules while cssutils does not</li>
<li>FB2 Input: Only accept known FB2 namespaces to avoid arbitrary file write</li>
<li>Content server: Fix various arbitrary file write bugs for authenticated users</li>
<li>Content server: Fix remote code execution for authenticated users</li>
<li>Content server: Fix cross site scripting in legacy book details page</li>
<li>MOBI Output: Make palmdoc compression robust against crafted input</li>
</ul></div>calibre 9.13
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Fri, 07 Aug 2026 08:00:00 +0530calibre-9.13<div><h2>Bug Fixes</h2><ul>
<li>PDF Output: Fix a regression in calibre 9 which caused links in PDF to scroll to a target location minus the top margin, thus ending up a few lines above the target</li>
<li>Content server: Fix an error when uploading a data file to a book with no existing data files</li>
<li>Content server: Fix a regression in the previous release that broke searching in the builtin viewer</li>
<li>Content server: Fix a regression in the previous release that caused the conversion options sections to be missing</li>
<li>Book details panel: Fix a regression in the previous release that broke drag and drop of covers</li>
<li>Windows: Fix a crash caused by some third party plugins trying to send notifications in non-GUI threads</li>
<li>Bulk metadata dialog: Fix a regression in the previous release that caused the yes/no buttons to be hidden for Yes/No column edit controls</li>
<li>Edit book: Compress Images: Fix error when converting GIF to JPEG on Windows</li>
<li>Linux: Preload html5-parser to avoid errors on systems that ship ancient libxml2 when converting to PDF</li>
</ul></div>calibre 9.12
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Fri, 31 Jul 2026 08:00:00 +0530calibre-9.12<div><h2>New Features</h2><ul>
<li>macOS: Add sharing of books via AirDrop to the Connect/Share button</li>
<li>Content server: Add support for plugins that can add new endpoints to the server backend</li>
<li>Edit book: Compress images: Add an option to convert GIF images to JPEG/WebP</li>
<li>ToC Editor: Add a button to sort the entries in the Table of Contents</li>
<li>Content server: OPDS: Add kind metadata to feed links</li>
<li>Kobo driver: Add support for latest Tolino firmware</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>E-book viewer: Fix an issue causing text area width to change when using section titles in header/footers and the text is too long to fit in the space</li>
<li>When adding books via calibre.exe fix --with-library not working. Now calibre will switch to the specified library and only then add the book</li>
<li>When evaluating recursive templates inherit python template policy</li>
<li>Fix inability to input more than ~30K characters in custom tag like columns</li>
<li>Fix some menu separators not rendering on some systems with high res monitors</li>
<li>Content server: fix un-styled flash when transitioning between series/author views in dark mode</li>
<li>Content server: Prevent unauthenticated users from updating annotations</li>
<li>Edit metadata dialog: Fix right click menu->Remove format not working</li>
<li>Edit book: fix typo in string format that broke convert PNG to JPEG function</li>
<li>Linux binaries: Preload libxml2 to ensure the correct version is loaded despite Qt WebEngine probing</li>
</ul></div>calibre 9.11
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Thu, 02 Jul 2026 08:00:00 +0530calibre-9.11<div><h2>New Features</h2><ul>
<li>Allow exporting annotations in the HTML format as a standalone web page that can be viewed in any browser with support for light/dark themes, searching and filtering by highlight style</li>
<li>E-book viewer: Ask AI: Allow using the {selected} placeholder when typing free form queries to the AI as well</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>E-book viewer: Fix text area not always resizing correctly when window is resized when the scrollbar is enabled</li>
<li>Fix a regression in the previous release that broke python templates in the book details panel</li>
<li>Fix a regression in the previous release that caused default values for custom columns to not be used when adding new books</li>
</ul></div>calibre 9.10
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Thu, 25 Jun 2026 08:00:00 +0530calibre-9.10<div><h2>New Features</h2><ul>
<li>Content server: A new "modern" interface with a sidebar to ease navigation</li>
<li>Content server: When used with HTTPS allow installation as a PWA (Progressive Web App)</li>
<li>Edit book: Saved searches: When filtering the list of saved searches match by keywords</li>
<li>CSS parsing: Add support for CSS Level 4 selectors</li>
<li>Cover grid: When using an image larger than the viewport as a texture scale it to fit the viewport</li>
<li>Annotations browser: Allow restricting displayed annotations by custom annotation styles as well</li>
<li>Edit book: Compress images: Add option to convert PNG images to JPEG or WEBP</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>E-book viewer: Fix IME on Windows not working when typing in notes for highlights</li>
<li>Conversion: Heuristics: Improve performance in some pathological cases</li>
<li>SNB Input: Fix error on some input files</li>
<li>Windows: fix rare crash when too many notifications are displayed at once</li>
<li>Fix duplicating of books not duplicating value from enumerated columns when the column has a default value defined</li>
<li>Fix a regression in 9.8 that caused errors from AI plugin providers to be silently swallowed and not displayed to user</li>
<li>Fix CSV export invalid when exporting comments field</li>
<li>Disallow Python templates when reading book metadata (CVE-2026-53511)</li>
</ul></div>calibre 9.9
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Thu, 28 May 2026 08:00:00 +0530calibre-9.9<div><h2>New Features</h2><ul>
<li>A new option to keep the current search when switching Virtual libraries under Preferences->Searching</li>
<li>Pages column: Add support for accurate page counting of fixed layout EPUB files</li>
<li>Add from ISBN: Ignore space around the colon used to separate identifier type from value</li>
<li>Get books: Update and improve the WolneLektury store</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>E-book viewer: Fix incorrect search match offsets in normal search mode when the text contains non-BMP Unicode characters</li>
<li>Content server: Apply null metadata when serving book files. Matches behavior of save to disk</li>
<li>Linux: Fix SSL certificate loading not working on Fedora 44</li>
<li>Bulk metadata dialog: Fix backspace key not working in number input boxes when set to Undefined</li>
</ul></div>calibre 9.8
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Fri, 01 May 2026 08:00:00 +0530calibre-9.8<div><h2>New Features</h2><ul>
<li>Content server: In the /mobile view allow clicking on book titles/covers to see book details</li>
<li>Edit book: Allow reset of zoom to 100% by right clicking in the preview panel</li>
<li>macOS Tahoe: Have the calibre app icon automatically use a dark look when the system is in dark mode</li>
<li>AI: Support for arbitrary local providers that export an OpenAI compatible interface</li>
<li>Allow auto closing calibre after running jobs complete when an attempt to close calibre is made while there are running jobs</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>Native TTS engine: Normalize text to NFKC so that word tracking works when the native engine reports spoken word with different normal form</li>
<li>When converting GIF images to PNG workaround bug in PIL causing exception when checking if the GIF is animated</li>
<li>Preserve existing conversation with AI when there is an error talking to it</li>
</ul></div>calibre 9.7
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Fri, 10 Apr 2026 08:00:00 +0530calibre-9.7<div><h2>New Features</h2><ul>
<li>Annotations browser: Allow grouping results by any field</li>
<li>E-book viewer: Handle native pinch to zoom gesture on touchpads the same as the pinch to zoom on touchscreens. Default action is to change font size.</li>
<li>Content server: Implement full offline mode when using HTTPS connections to the content server</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>E-book viewer: Fix a regression in the previous release that caused annotations/last read information to not be saved in e-book files</li>
<li>AI: Make the GitHub backend a bit more robust</li>
<li>AI: OpenRouter backend: Fix reasoning level "auto" disabling all reasoning</li>
<li>Content server: Read book: Fix regression causing error during searching</li>
<li>Content server: Fix opening results from full text search not working</li>
<li>Fix a couple of minor regress in the new Full text search view introduced in the previous release</li>
<li>MTP driver: Linux: Fix a rare crash when connecting devices with large collections</li>
<li>Fix cover not being set when adding files to existing book records with no cover</li>
</ul></div>calibre 9.6
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Fri, 27 Mar 2026 08:00:00 +0530calibre-9.6<div><h2>New Features</h2><ul>
<li>Full text search: A new cards based view of full text search results with book covers</li>
<li>A new "word-prefix" completion mode that shows matches that have any word starting with the typed in letters</li>
<li>Bookshelves: Add option to have the height of books be constant per group</li>
<li>Edit book: File list: Allow using Ctrl+Shift+Left/Right to move an item to top/bottom of the list</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>Fix notes being lost when changing the lookup name of custom column</li>
<li>E-book viewer: Fix using the slower/faster buttons causing a chapter skip when using the Piper neural speech backend</li>
<li>Content server viewer: Fix annotations being not synced to the server in some Android devices when using the Firefox browser</li>
<li>Windows: Force kill calibre.exe on quit to workaround hang in interpreter shutdown on some systems</li>
<li>TXT Output: Fix asciiize option not applying to generated inline Table of Contents</li>
<li>E-book viewer: Disallow background images from the internet. This was an unused feature anyway (CVE-2026-33205)</li>
<li>TXT Input: Ensure resource files are read only from book contents (CVE-2026-33206)</li>
<li>Only apply changes to text fields in the book list when the new value is different from the old</li>
<li>Completions: Update list of completion suggestions when cursor is moved</li>
</ul></div>calibre 9.5
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Fri, 13 Mar 2026 08:00:00 +0530calibre-9.5<div><h2>New Features</h2><ul>
<li>Allow creating a column to display reading progress</li>
<li>Annotations browser: Allow filtering by highlight style</li>
<li>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</li>
<li>Edit book: Add a tool to remove unused images, similar to the tool to remove unused CSS</li>
<li>Tolino driver: support new firmware version</li>
<li>E-book viewer: Add a reset button to the reading stats panel</li>
</ul>
<h2>Bug Fixes</h2><ul>
<li>Fix overridden icons from config directory not switching between dark/light variants on theme change</li>
<li>Fix: Use MOBI fallback for KFX format when downloading news periodicals</li>
<li>Edit book: Restore focus to editor after showing search count popup message</li>
<li>Fix a bug in KEPUB markup removal when there are empty kobo spans</li>
<li>RB Input: Ensure files are extracted within container dir (CVE-2026-30853)</li>
<li>Book list: Fix ctrl+shift+arrow key not moving the currently selected book. Fixes #2142950</li>
</ul></div>