Calibre is a FREE & open-source suite of e-book software for multiple platforms (Windows, Mac/macOS, Linux). Calibre supports organizing existing e-books into virtual libraries, displaying, editing, creating and conversion of e-books, as well as syncing e-books with a variety of e-readers. Editing books is supported for EPUB and AZW3 formats. Books in other formats like MOBI must first be converted to those formats, if they are to be edited.
Calibre is a vibrant open-source community with half a dozen developers and many, many testers and bug reporters. It is used in over 200 countries and has been translated into a dozen different languages by volunteers. Calibre has become a comprehensive tool for the management of digital texts, allowing you to do whatever you could possibly imagine with your e-book library.
ToC Editor: Allow undo for renaming single items as well.
Bug Fixes
Version 3.24.1 fixes a regression in the 3.24 in the editor that caused syncing between the editor and the Preview panel/Live CSS panel to not work correctly
PDF Output: Strip zero-width space characters from the text as their presence prevents searching from working
DOCX Output: Fix
tags not being converted correctly.
DOCX Input: Fix incorrect conversion of a framed block that contains a list.
Conversion: Fix private entities that use the same name as an HTML entity not being handled correctly
Viewer: Fix HTML files with private entities displaying an artifact at the top
Edit book: Check book: Show an error for HTML files with private entities
EPUB3 Input: Fix titlepage being referred to in the nav causing two titlepage entries in the final book.
Fix throbber buttons not being perfectly aligned inside toolbars
Quickview: Fix sizes not being displayed.
Edit book: Compress images tool: Do not mark the book as changed if no images could be further compressed.
Book list split-view: Fix horizontal scroll position of split view can change when changing the current column in one view.
Fix Bookeen Saga not being recognized on macOS/Linux.
Edit metadata dialog: Fix undo last trim not working for automatic trims.
Content server: Fix series field blank in Italian translation
BeautifulSoup: Port fix from upstream for outputting bare ampersands in strings.
calibredb add: Run the input plugins before reading metadata instead of after.
ToC Editor: Allow undo for renaming single items as well.
Bug Fixes
Version 3.24.2 fixes a bug in the new EPUB 3 output functionality that prevented conversion of non-EPUB 3 books to EPUB 3
Version 3.24.1 fixes a regression in the 3.24 in the editor that caused syncing between the editor and the Preview panel/Live CSS panel to not work correctly
PDF Output: Strip zero-width space characters from the text as their presence prevents searching from working
DOCX Output: Fix
tags not being converted correctly.
DOCX Input: Fix incorrect conversion of a framed block that contains a list.
Conversion: Fix private entities that use the same name as an HTML entity not being handled correctly
Viewer: Fix HTML files with private entities displaying an artifact at the top
Edit book: Check book: Show an error for HTML files with private entities
EPUB3 Input: Fix titlepage being referred to in the nav causing two titlepage entries in the final book.
Fix throbber buttons not being perfectly aligned inside toolbars
Quickview: Fix sizes not being displayed.
Edit book: Compress images tool: Do not mark the book as changed if no images could be further compressed.
Book list split-view: Fix horizontal scroll position of split view can change when changing the current column in one view.
Fix Bookeen Saga not being recognized on macOS/Linux.
Edit metadata dialog: Fix undo last trim not working for automatic trims.
Content server: Fix series field blank in Italian translation
BeautifulSoup: Port fix from upstream for outputting bare ampersands in strings.
calibredb add: Run the input plugins before reading metadata instead of after.
Calibre is a nice (and free!) tool for cataloging collections of ebooks. Lately I've been using it to organize a bunch of titles to load on my Amazon Fire tablet for reading.
The big think to keep in mind with Calibre is that updating the metadata doesn't update the actual book files, instead the metadata is stored in its own Calibre library file. If you update the metadata for a book then copy just the book files to a different location then the metadata doesn't copy with it, you need to either use Calibre to copy the book to a device or to copy the Calibre library.
PDF Output: Add an option to use page margins from the input document, specified via @page CSS rules.
Bug Fixes
Fix option to "show text under buttons only if there is enough space" not working well with the option to use "two lines for the text under the buttons".
Update notification: When both calibre and plugin updates are available and the user updates only the plugins, fix the restart calibre button not working.
E-book viewer: Fix printing of comics (cbz/cbr files) not working.
EPUB3 Input: Fix Table of Contents not being recognized for some EPUB 3 books that placed their nav document in-side a sub-folder.
Book list: Allow drag and drop of books onto other books to merge the book records.
Check Book: External link checker: Also check HTML anchors (the part after the # in the link). Can be turned off via a checkbox at the bottom of the link checker window.
Edit Book: Preview panel: Show previews when editing SVG files
Edit book: When downloading external resources, also convert data URLs into files.
E-book viewer: When the controls are hidden show the progress in the window title.
Library Quick switch menu: Highlight the previously switched from library in bold.
Bug Fixes
PDF Input: Fix a regression in 3.24 that caused conversion of PDF to be significantly worse.
E-book viewer: Fix very slow loading for HTML files with very many images on Linux.
Content server: Fix a regression in 3.14 that removed the separator between books in the detailed list view mode.
Edit book: Fix SVG files not being beautified by the Beautify all files tool
Edit book: Fix searching in selected files not searching SVG files
Fix Tweaks help string not being displayed translated
Edit metadata dialog: Fix distorted rendering of some labels in the custom metadata tab in rare circumstances.
Book list: Allow drag and drop of books onto other books to merge the book records.
Check Book: External link checker: Also check HTML anchors (the part after the # in the link). Can be turned off via a checkbox at the bottom of the link checker window.
Edit Book: Preview panel: Show previews when editing SVG files
Edit book: When downloading external resources, also convert data URLs into files.
E-book viewer: When the controls are hidden show the progress in the window title.
Library Quick switch menu: Highlight the previously switched from library in bold.
Bug Fixes
PDF Input: Fix a regression in 3.24 that caused conversion of PDF to be significantly worse.
E-book viewer: Fix very slow loading for HTML files with very many images on Linux.
Content server: Fix a regression in 3.14 that removed the separator between books in the detailed list view mode.
Edit book: Fix SVG files not being beautified by the Beautify all files tool
Edit book: Fix searching in selected files not searching SVG files
Fix Tweaks help string not being displayed translated
Edit metadata dialog: Fix distorted rendering of some labels in the custom metadata tab in rare circumstances.
version 3.26.1 prevents dropping of a book onto itself from triggering the merge dialog, which should reduce accidental triggers
Bulk metadata edit dialog: Add an "edit tags" button for tags like custom columns.
Add an option in Preferences->Look & feel to disable the new 'drag and drop to merge books feature'
E-book viewer: Add a shortcut (Ctrl+Alt+B) to toggle the bookmarks panel.
Edit book: Add a copy to clipboard button on the various report dialogs
Edit book: Add a shortcut (Ctrl+Alt+Down) to edit the next file in the book spine.
calibre-smtp: Verify relay server TLS certificates by default. New option --dont-verify-server-certificate to restore old behavior.
Bug Fixes
Conversion: Fix a regression in the previous release that caused conversion of EPUB 3 to EPUB 3 to fail.
Fix detection of the Bookeen NolimbookXL on macOS and Linux
Fix a regression that broke the fetching of annotations from Kobo and Kindle devices.
DOCX Input: Fix failure to convert some DOCX files that use Symbol fonts.
When exporting very large libraries fix failures due to busy errors.
Fix commas not working in identifiers that are transformed to URLs via rules.
Review downloaded metadata: Fix cancel button on the confirm reject all dialog not working.
Kindle Fire driver: Send books by default to the "kindle" folder instead of the "Books" folder to workaround a change in the Fire firmware that causes the Kindle to not recognize files in the Books folder.
Linux installer: Also fix the execute bits in the umask if the user runs the installer with a umask that prevents files from being world executable.
Sort the entries in the show column menu alphabetically.
Bulk metadata edit dialog: Add an "edit tags" button for tags like custom columns.
Add an option in Preferences->Look & feel to disable the new 'drag and drop to merge books feature'
E-book viewer: Add a shortcut (Ctrl+Alt+B) to toggle the bookmarks panel.
Edit book: Add a copy to clipboard button on the various report dialogs
Edit book: Add a shortcut (Ctrl+Alt+Down) to edit the next file in the book spine.
calibre-smtp: Verify relay server TLS certificates by default. New option --dont-verify-server-certificate to restore old behavior.
Bug Fixes
Version 3.27.1 fixes a build error in 3.27.0 that caused calibre not to start on macOS older than High Sierra
Conversion: Fix a regression in the previous release that caused conversion of EPUB 3 to EPUB 3 to fail.
Fix detection of the Bookeen NolimbookXL on macOS and Linux
Fix a regression that broke the fetching of annotations from Kobo and Kindle devices.
DOCX Input: Fix failure to convert some DOCX files that use Symbol fonts.
When exporting very large libraries fix failures due to busy errors.
Fix commas not working in identifiers that are transformed to URLs via rules.
Review downloaded metadata: Fix cancel button on the confirm reject all dialog not working.
Kindle Fire driver: Send books by default to the "kindle" folder instead of the "Books" folder to workaround a change in the Fire firmware that causes the Kindle to not recognize files in the Books folder.
Linux installer: Also fix the execute bits in the umask if the user runs the installer with a umask that prevents files from being world executable.
Sort the entries in the show column menu alphabetically.
Add a option to draw a grid in the main book list (Preferences->Look & feel)
Edit book: Allow removing the currently highlighted tag (while keeping its contents) by pressing Ctrl+>. You can also add a tool to do it via Preferences->Toolbars
Content server: When defining a color scheme for the in browser viewer allow specifying the link color as well as the foreground and background.
Edit book: Show a popup after a fix all html/beautify all files so the user can easily see what was changed, if needed.
Kindle driver: Create cover thumbnails on the device when transferring KFX format books
Edit Book: Recognize numbers in image names in the 'Insert image' dialog
Bug Fixes
Content server: Display custom comments field on the book details page in the same order as in the calibre GUI
Edit book: Fix open image editors not being updated when image file is replaced
Fix keyboard shortcuts for Edit book tools created from plugins not working
PDF Output: Fix error when trying to convert books that do not specify a language in their metadata.
Browser viewer: Fix inability to open books that contain zero-byte stylesheets/images
ToC Editor: When generating ToCs using headings/XPath ignore duplicate entries at the same level that have the same text.
Windows: The default calibre library location is now not in My Documents but instead in the user home folder, to avoid issues with OneDrive auto-syncing calibre libraries
Kobo driver: Support for new firmware version
Add a tweak (in Preferences->Tweaks) to allow skipping network check on news download
Edit metadata dialog: Show a confirmation dialog on cancel if some changes have been made.
Bug Fixes
Downloaded metadata review dialog: Fix a regression in the last release that broke the revert buttons
E-book viewer: Fix clicking links in the footnote popup ignoring the anchor part of the link.
ToC editor: Fix generating toc entries from links not working for links that start with #
HTML Input: Collapse multiple spaces in filenames when sanitizing them.
Edit book: Remove matching tag: Fix incorrect removal if the remove matching function is triggered in rapid succession
Edit book: Fix some links in the file being split not being adjusted when splitting HTML files.
Fix a crash when using some third party plugins and enabling the "two lines for text under icons" option
Make the create catalog dialog freely resizable
DOCX Input: Fix an error when converting some DOCX files with inherited fonts.
Book list: Allow changing the font used for any column to bold and/or italic by right clicking on the column header and choosing 'Change font style'.
fetch-ebook-metadata.exe: Allow specifying identifiers other than just ISBN
Amazon metadata download: Add support for Amazon Australia (can be configured via Preferences->Metadata download->customize the amazon metadata source)
Table of Contents Edit tool: When generating from XPath's add a checkbox to control if duplicate entries at the same level are added or not.
Edit book: Allow disabling the popup to show changes after running the Fix HTML and Beautify all files tools.
Bug Fixes
DOCX Input: Fix figures in newer Word documents being duplicated.
Content server: Disable offline access if application cache is not available, rather than failing.
DOCX Output: Workaround for broken CSS that uses -o-pre-wrap for the white-space property
Metadata download: Remove the option to lookup first edition dates as the service used to get the data no longer exists
Edit book: Insert image dialog: Add buttons to change the image thumbnail size.
Book details panel: Allow right clicking on a format to open it in the calibre editor
Edit metadata dialog: Allow viewing or editing specific formats by right clicking the format in the formats list
When creating a metadata jacket allow HTML in custom long text columns
Content server: When editing metadata add a button to remove the existing cover. Note that after removing the cover a auto-generated cover is displayed instead. You might need to hit refresh in your browser to see the change.
Content server: Date edit: Add buttons to clear the date or set it to today's date
Bug Fixes
When showing books on the device, disable keyboard shortcuts for actions that operate on library books
Content server: Custom List: Fix a zero series index being displayed as one
Content server: Fix covers not being updated in downloaded copies of some books.
PDF Output: Fix an error that could occur in rare circumstances when using the option to read page margins from the input document
Edit book: Check book: Fix an error if a filename contains a % character
PDF Output: Fix CSS opacity property causing text to not be rendered. Now opacity is ignored, as it is unsupported by Qt WebKit.
Create custom column dialog: Ensure that the format numbers field is always visible
Edit book: Insert hyperlink: Allow specifying a template to control the markup that is inserted for the hyperlink.
Metadata download: Add an option (in Preferences->Metadata download) to keep multiple results from individual metadata sources, useful if you prefer to pick the best result by hand and use only one or two metadata sources.
Kobo driver: Add an option to directly update metadata in the Kobo device database, instead of waiting for the Kobo to update the database after disconnecting. (Preferences->Plugins->Customize the Kobo device plugin)
Bug Fixes
E-book viewer: Fix a regression that broke viewing of HTMLZ files
Edit book: Fix suggestions in completion popup not being sorted.
Windows: Fix restarting calibre with system tray icon enabled causing duplicate defunct icons in the tray.
