Library Management for e-book collection by: Title, Author, Date added, Date published, Size, Rating, Series, etc. even go out onto the internet to find book metadata based on existing title/author or ISBN information.
E-book conversion to convert a huge number of formats. It can rescale all font sizes, ensuring the output e-book is readable no matter what font sizes the input document uses. It can automatically detect/create book structure, like chapters and Table of Contents.
Syncing to e-book reader devices. If a book has more than one format available, calibre automatically chooses the best format when uploading to the device. If none of the formats is suitable, calibre will automatically convert the e-book to a format suitable for the device before sending it.
Comprehensive e-book viewer. Calibre has a built-in ebook viewer that can display all the major ebook formats. It has full support for Table of Contents, bookmarks, CSS, a reference mode, printing, searching, copying, customizing the rendering via a user style sheet, embedded fonts, etc.
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