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 Home » OlderGeeks.com Freeware Downloads » Office, Home Office, Business and Writing » eBook Readers and Tools » Calibre v8.4.0   
File - Download Calibre v8.4.0
Description
A plea...
Deanna and I have been running this site since 2008 and lately we're seeing a big increase in
users (and cost) but a decline in percentage of users who donate. Our ad-free and junkware-free
download site only works if everyone chips in to offset the revenue that ads on other sites bring
in. Please donate at the bottom of the page. Every little bit helps. Thank you so much.
Sincerely,
your Older Geeks: Randy and Deanna



Always scroll to the bottom of the page for the main download link.
We don't believe in fake/misleading download buttons and tricks. The link is always in the same place.


Calibre v8.4.0

A free and open source e-book library management application developed by users of e-books for users of e-books.

It has a cornucopia of features divided into the following main categories:
• Library Management
• E-book conversion
• Syncing to e-book reader devices
• Downloading news from the web and converting it into e-book form
• Comprehensive e-book viewer
• Content server for online access to your book collection
• E-book editor for the major e-book formats




From the author:
Calibre started life on 31 October, 2006, soon after the release of the SONY PRS-500, the first e-ink based reader to be sold commercially in the US. At the time, I was a graduate student, with a lot of time on my hands. The PRS-500 did not work at all with Linux, my operating system of choice, so I decided to reverse engineer the USB protocol that it used, to get it working on Linux. This was accomplished with the help of the fine folks over at mobileread.com and calibre was born, albeit named libprs500.

At the time there were no satisfactory tools to convert content into the LRF format, used by the SONY reader, so I decided to implement a converter to convert the most popular e-book formats to LRF. This converter proved to be wildly popular and far better than the (mostly non-existent) offerings from SONY. It was picked up and used by various publishing houses and content digitizers to produce the first generation of books in the LRF format.

As my e-book collection grew, I realized that managing it was quickly becoming unwieldy, so I decided to write a graphical interface to libprs500 to make it easier. This became calibre, in its present form, as a comprehensive e-book management tool. libprs500 was renamed to calibre in mid-2008. The name calibre was chosen by my wife, Krittika. The libre in calibre stands for freedom, indicating that calibre is a free and open source product, modifiable by all. Nonetheless, calibre should be pronounced as cali-ber, not ca-libre.

Today 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. Reading is very important to me and one of my goals has always been to prevent either the fragmentation or the monopolization of the e-book market by entities that care solely for short-term goals. As the calibre community continues to grow, driven by book lovers, for book lovers, hopefully it will always present an alternative for people that love to read e-books and want to be in control of their own digital libraries.

-Kovid Goyal



Changes:
v8.4 [09 May, 2025]
New features
KEPUB Output: Add an option to generate KEPUB files that have better text justification at the cost of gaps in highlighting when used on the Kobo
Closes tickets: 2107778
E-book viewer: Allow the background image specified in the Style section of the viewer preferences to extend under the page margins as well

Bug fixes
E-book viewer: Fix a regression that broke the "show book in main calibre program" link
Closes tickets: 2110117
News download: Fix Next/Previous links not working when the pointed to article failed to download
E-book viewer: Handle links to missing internal files with an error popup rather than becoming non-functional
E-book viewer: Fix some links not being processed correctly for very large EPUB files with many internal HTML files
Get books: Update ebooks.com plugin for website changes
Metadata review dialog: Fix merging of tags not working correctly
Wayland: Workaround Qt/Wayland bug that prevents the menu of the Layout button from showing
Closes tickets: 2109755
Prevent recursion when creating base temporary folder if something on system deletes the created temporary folder
Closes tickets: 2109612

New news sources
Frieze Magazine by Kabonix

Improved news sources
NYTimes Book Review
Washington Post
tagesschau
Hindu
Economist
Economist Espresso
















This download (bottom of page) is for the Windows portable version. All other download assets are below:


Windows 10/11:
calibre-64bit-8.4.0.msi
Windows 8/8.1:
calibre-5.44.0.msi
calibre-64bit-5.44.0.msi
calibre-portable-installer-5.44.0.exe
Windows 7:
calibre-3.48.0.msi
calibre-64bit-3.48.0.msi
calibre-portable-installer-3.48.0.exe

MacOS (Ventura) and higher:
calibre-8.4.0.dmg
MacOS older than 13.0 (Ventura):
calibre-6.29.0.dmg
MacOS older than 11.0 (Big Sur):
calibre-6.11.0.dmg
MacOS older than 10.15 (Catalina):
calibre-5.44.0.dmg
MacOS older than 10.14 (Mojave):
calibre-3.48.0.dmg
MacOS 10.8 (Mountain Lion):
calibre-2.85.1.dmg

Linux:
calibre-8.4.0-x86_64.txz
calibre-8.4.0-arm64.txz




Click here to visit the author's website.
Continue below for the main download link.


Downloads Views Developer Last Update Version Size Type Rank
10,847 24,566 Kovid Goyal <img src="https://www.oldergeeks.com/downloads/gallery/thumbs/Calibre1_th.png"border="0"> May 13, 2025 - 11:23 8.4.0 185.2MB EXE 5/5, out of 90 Votes.
File Tags
Calibre  v8.4.0  
      
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Thank you! -Randy & Deanna (The Older Geeks)
Missouri Ozarks, USA

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