Calibre is an open source e-book library management application that enables you to manage your e-book collection, convert e-books between different formats, synchronize with popular e-book reader devices, and read your e-books with the included viewer.
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, giving you access to your book collection over the internet using just a browser.
Calibre 5.25 new features:
Edit/Polish book: Remove unused CSS now also removes unreferenced stylesheets. Closes tickets: 1939469
E-book viewer: Add some CSS variables and classes that allow writing calibre specific CSS in ebooks. See https://manual.calibre-ebook.com/viewer.html#designing-your-book-to-work-well-with-the-calibre-viewer
A new framework plugins can use to be notified about changes to calibre libraries
Edit metadata dialog: When pasting into the identifiers field if the clipboard contains a URL paste it directly as a URL identifier. Closes tickets: 1938752
E-book viewer: When displaying popup footnotes use the same writing direction as the main text for the footnote popups size and header. Closes tickets: 1938448
E-book viewer: Improve the text layout when looking up words in Google
Content server viewer: Fix read aloud not working on mobile browsers
Improved news sources
The Guardian and The Observer
Wall Street Journal
Download: Calibre 5.25 for Windows | Portable | Windows 64-bit | ~100.0 MB (Open Source)
Download: Calibre 5.25 for MacOS | 145.0 MB
Download: Calibre 5.25 for Linux
View: Calibre Home Page | Calibre Screenshot