| Version | Change log |
| Calibre Portable 9.2.0 Feb 6, 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 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 Fix drag and drop of books into bookshelf view not working Bookshelf: Fix bookshelf view blank on some macOS systems E-book viewer: Fix a regression in calibre 9.0 that broke the Go to page function E-book viewer: Fix google dictionary lookup results not legible E-book viewer: Fix PageUp/PageDown keys needing to be pressed repeatedly at internal HTML file boundaries in flow mode Bookshelf: Avoid rendering during initial show while the view is still being resized Fix a regression in calibre 9.0 that caused mouse wheel to scroll a full row at a time in the Cover grid News download: Fix a regression in 8.11 that broke automatic cleanup of downloaded HTML |
| Calibre Portable 9.1.0 Jan 31, 2026 |
New features: This is a pure bugfix release fixing various regressions in calibre 9.0 Bug fixes: Fix restore database not working Windows: Fix the Read Aloud feature in the E-book viewer not working when using the Piper engine Fix using icon themes in "For dark and light" mode not working 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 Improved news sources: Economist |
| Calibre Portable 9.0.0 Jan 30, 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 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 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 EPUB3 metadata: Handle identifiers that use HTTP URLs without the url: prefix Edit book: Check book: Fix spurious unreferenced warnings for SMIL media overlay audio files Edit book: Reports: Have pressing enter do the same action as double clicking the current entry E-book viewer: Improve export of SVG images Disable GPU acceleration for Qt WebEngine by default to prevent crashes on some older systems. Can be re-enabled via Preferences->Tweaks Speedup calibre shutdown time by a couple of seconds Improved news sources: Times Literary Supplement Private Eye New Yorker |
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