Calibre is program to manage your e-book collection. It acts as an e-library and also allows for format conversion, news feeds to e-book conversion, as well as e-book reader sync features and an integrated e-book viewer. Calibre's features include: library management; format conversion (all major ebook formats); syncing to e-book reader devices; fetching news from the Web and converting it into ebook form; viewing many different e-book formats.

Calibre is a powerful and easy to use e-book manager. Users say it’s outstanding and a must-have. It’ll allow you to do nearly everything and it takes things a step beyond normal e-book software. It’s also completely free and open source and great for both casual users and computer experts.

Calibre’s user interface is designed to be as simple as possible. Large buttons in the main window take care of most of your needs. The vast number of calibre’s features and options is always clearly displayed under intuitive tabs. Its context menus are neatly sorted, so the things you’re looking for almost find themselves on their own. You’re never more than three clicks away from your goal. It’s the result of years of tweaking calibre’s interface based on users’ feedback. Plus, you can change many aspects of how calibre looks and feels and try one of the three built-in library views to browse your book collection using covers, titles, tags, authors, publishers, etc.

Calibre not only can download all the metadata for an e-book (things like title, author, publisher, ISBN, tags, cover or summary) but will also allow you to edit or create metadata in existing or new fields. That way you can track which books you’ve read and which ones you liked. You can also take advantage of the advanced search and sorting functions that use tags, authors, comments and more. You will find the book you were looking for in seconds!

Calibre supports almost every single e-Reader and is compatible with more devices with every update. You can transfer your e-books from one device to another in seconds, wirelessly or with a cable. And you don’t need any additional tools to do that. calibre will send the best file format for your device converting it if needed, automatically.

No matter what PC, laptop or tablet you use, calibre’s got you covered. And if you’re traveling and don’t have your device with you – you can take calibre on a USB stick and use it wherever you are.

Calibre can convert dozens of file types. No matter where you got your e-book from, it’ll be ready for your device in no time. When converting, you can also automatically change the book’s style, create a table of contents or improve punctuation and margins. calibre will also detect the format that’s best suited for your device on its own, so you don’t have to bother.

Calibre can also turn your personal documents to e-books or create them from scratch. It can also take all the mundane things that go with it off your plate. It has automatic style helpers and scripts generating the book’s structure. You focus on the content, calibre will take care of the rest.

Comprehensive e-book viewer:
calibre has a built-in e-book viewer that can display all the major e-book formats. It has full support for Table of Contents, bookmarks, CSS, a reference mode, printing, searching, copying, multi-page view, embedded fonts, and on and on…

Download news/magazines from the web:
calibre can make sure you know what’s happening and automatically deliver stories to your device from hundreds of news sources like The Economist, New York Times, New Yorker Magazine, The Guardian, BBC News, National Geographic, CNN, The Wall Street Journal, The Washington Post, The Atlantic, Scientific American, Wired Magazine, The Telegraph, Forbes, Ars Technica…
You can also teach calibre to deliver news from completely different sites or take advantage of any RSS feed. No searching, no waiting, no hassle.

New Release
New features:
Read aloud: Add the high quality Kokoro voices, which sound much more natural than the Piper voices, especially for English
To use them, select the Piper backend in the Read aloud configuration and choose one of the Kokoro voices. The voice will be automatically downloaded the first time it is used.
News download: Support for downloading news from websites that block automated access by using the camoufox browser
Some news sites, such as The New York Times, The Economist and The Atlantic, block all lighter weight ways of fetching their pages. Recipes for these sites now use the camoufox browser, which is automatically downloaded the first time such a recipe is run. Recipe authors can use it by setting browser_type = 'camoufox' in their recipes.
PDF Input: Support for right-to-left text and better handling of multi-column pages
Add support for reading images in the AVIF format
Tag browser: A new option to sort hierarchical tags that have only children but no actual books as folders, before all other tags at their level
Edit book: Check book: Allow skipping of problems of a particular type
Edit book: ToC View: Indicate what ToC entries, if any, are in the file being currently edited
Edit book: Check book: When auto fixing invalid ids also update CSS selectors
E-book viewer: Add an option to display the immediate parent ToC section in headers/footers
E-book viewer: Allow e-books to store up to 1MB of data persistently
E-book viewer: Print to PDF: Allow specifying margins in metric units
Tag mapper and HTML/CSS transform rules: Add the ability to search the rules
Allow removing individual entries from the search history dropdown
Add a button to Preferences->Look & feel->Main interface to reset the main window layout
Create your own Adventure: Allow exporting and importing saved games
Speed up various operations on large libraries, such as startup, deleting many books, sorting by series, searching and refreshing the Tag browser
Kobo driver: Add suppor
[ Calibre Portable release history ]

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