calibre
Ebook manager, viewer & converter.
Some of the top features or benefits of calibre are: Open Source, Wide Format Support, Library Management, Conversion Tools, Customization, Cross-Platform Compatibility, and Plugin Support. You can visit the info page to learn more.
- Open Source
Best calibre Alternatives & Competitors in 2025
The best calibre alternatives based on verified products, community votes, reviews and other factors.
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11
Open-Source Alternatives.
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/fbreader-alternativesFBReader is an e-book reader for various platforms. Features:
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/amazon-kindle-alternativesAmazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
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/calibre-web-alternativesCalibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...
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/sumatra-pdf-alternativesSumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
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/google-play-books-alternativesGoogle Play Books lets you search, preview, and buy millions of books using Google Book Search.
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/okular-alternativesOkular is a universal document viewer based developed by KDE.
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/koreader-alternativesAn ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on...
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/readera-alternativesRead book files in EPUB, PDF, DOC, DOCX, RTF, TXT, DJVU, FB2, MOBI and CHM formats.
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/cool-reader-alternativesFast and small cross-platform eBook reader for desktops and handheld devices
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/adobe-digital-editions-alternativesebook reader software
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/apple-books-alternativesThe all-new Apple Books has been redesigned to make finding, reading, and listening to books a beautiful, effortless experience on iPhone and iPad.
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/z-lib-alternativesZLibraryPart of Z-Library project. The world's largest ebook library.
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/sigil-alternativesSigil is a multi-platform WYSIWYG ebook editor. It is designed to edit books in ePub format.