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27 votes

How can I reduce the resolution of images in an epub or mobi file?

Calibre already offers this functionality without any plugin. It's part of the ebook editor that installs with Calibre. The editor will only edit files in the epub or azw3 format though. You can ...
ChoiceD's user avatar
  • 371
15 votes

Command line extraction of metadata (title. author) from epub file

exiftool can read (but not write) epub meta data. For example exiftool -T -Title main.epub
pheon's user avatar
  • 251
12 votes
Accepted

How do I prevent Calibre from modifying EPUB files when I read them?

I hadn't looked before so I did a little investigating. With Calibre 4.23 on Linux, I found that it's not exactly Calibre, it's the Reader. I don't know why this Reader (it's a newly re-written reader,...
user10216038's user avatar
7 votes

Any opensource or free css stylesheets for books?

Paul Salvette wrote an ebook formatting guide which I recommend. He wrote boilerplate css which you can view/download here: http://bbebooksthailand.com/bb-CSS-boilerplate.html His company has ...
idiotprogrammer's user avatar
7 votes
Accepted

Can I change the cover of a mobi/epub book?

Yes we can do that using opensource software like Calibre. Install the Calibre software and start the program. Copy the ebook.mobi file to your PC. Drag the book onto the Calibre software UI. It will ...
Amol Patil's user avatar
5 votes

ePub readers for Windows that support continous scrolling?

Try the calibre ebook viewer: open your book and enable "Switch to flow mode" (the button on the top right corner)
Pastur's user avatar
  • 151
5 votes

How to add external epub to Kobo Desktop?

I've managed to upload external ePubs to Kobo's Desktop App on a Mac. Whether a similar process would work on a Windows machine, I can't comment, but in case this helps any Mac users out there: You ...
GGx's user avatar
  • 151
5 votes
Accepted

How can I reduce the resolution of images in an epub or mobi file?

I had a similar situation: a 134 MB .mobi that I wanted to shrink. Here's how I reduced the file size to 26 MB. The key to this approach is that an .epub is actually just a zipped web page with ...
Matt Greene's user avatar
5 votes

How can I reduce the resolution of images in an epub or mobi file?

Note: I intended to leave this as a comment for @mosh but didn't have the necessary rep. This is my own personal solution based on the solution he outlined. This will recursively scan a specified ...
justathoughtor2's user avatar
5 votes
Accepted

How to change text alignment with Calibre book editor

You can use a CSS style to apply this formatting to all your text: body { text-align: left; } This rule will be applied to all your text, so it will affect both regular paragraphs (<p> and ...
Sekhemty's user avatar
  • 6,214
5 votes

Can I change the cover of a mobi/epub book?

Actually, there's an easier way of changing the content: Change the file extension of your epub book from ".epub" to ".zip" You will be able to access all content because, now, the file became just a ...
Some Joe's user avatar
5 votes

Does .epub support inline links?

Yes, you can do that, .epub books are basically made of HTML and CSS, so if you have knowledge of these languages, in theory you can manually build an .epub from scratch (but the norm is to use ...
Sekhemty's user avatar
  • 6,214
5 votes

How do I export Wikipedia article collections to epub?

This feature was removed as the result of changes of the mwlib that was used for export to ocg that has better support for non-latin scripts for PDF files. In the process EPUB export was disabled, ...
Anthon's user avatar
  • 7,641
5 votes
Accepted

Is there an epub reader for a PC which lets the user take notes?

If the EPUB is DRM free, you can upload it to your Google Play Books account. Then if you enable note syncing from the mobile app, it'll save the notes in a doc on your Google Drive and use that to ...
thinkulum's user avatar
  • 416
4 votes

I am looking for a software or a way to list, extract, count, in short, analyze a book which is in epub or pdf format

Here is one way to find the number of words in an epub file sorted by their frequency, with the words used the most at the top of the list. This is done on a Mac laptop and will also work on Unix ...
StandardEyre's user avatar
4 votes

Command line extraction of metadata (title. author) from epub file

To print out epub metadata, exiftool yourbook.epub To edit the metadata, you'd need to unzip it and then zip it back again, as mentioned by others, epub is just a zip file mkdir tempfolder mv ...
GypsyCosmonaut's user avatar
4 votes

Command line extraction of metadata (title. author) from epub file

with Calibre's ebook-meta Example output of ebook-meta unixpowertools.epub: Title : UNIX Power Tools, 3rd Edition Author(s) : Jerry Peek, Shelley Powers, Tim O’Reilly & ...
Matthias Braun's user avatar
4 votes
Accepted

What are epub JSON links?

The reader should just ignore it. According to epub standard which says content should be valid XHTML or HTML5 and then following the links through to the RFC 3987 for an URI section 2.2 a href ...
mmmmmm's user avatar
  • 1,210
4 votes

How can I reduce the resolution of images in an epub or mobi file?

bash script to for bulk compressing images in big.epub to small.epub on Windows7 or Linux. You need to install cygwin on windows for (bash, unzip, zip, find, imagemagick). #!/usr/bin/bash USAGE="...
mosh's user avatar
  • 141
4 votes
Accepted

How to alternate row colors of tables in ePub files

You can use the following CSS rules to style respectively even or odd table rows (See the Example on W3schools): tr:nth-child(even) { background-color: #f2f2f2 } tr:nth-child(odd) { ...
Sekhemty's user avatar
  • 6,214
4 votes
Accepted

Epub 2.0 vs 3.0

Epub 3 is designed to be backward compatible. So a epub3 file will almost always render on reading systems which read only epub 2. Whether it will actually look good in a epub2 only reading system is ...
idiotprogrammer's user avatar
4 votes
Accepted

What are serif and sans serif fonts on different ebook reading systems?

Kobo ereader devices My 1st gen Kobo Glo has the following fonts pre-installed (I suppose other Kobo devices use the same set; it is possible for the user to add more but I think this is beyond the ...
Sekhemty's user avatar
  • 6,214
4 votes

How do I export Wikipedia article collections to epub?

There is an extension for Firefox called GrabMyBooks that can convert any webpage to .epub format. It seems to me that it was also available for Chrome, but I'm not entirely sure, maybe I'm wrong.
Sekhemty's user avatar
  • 6,214
4 votes
Accepted

Which major eBook reading applications support JavaScript?

I don't believe any reader 'fully' supports EPUB3, in part because the EPUB3 and its satellite specs (e.g. annotation, distributable objects, widgets) are so broad that it's not viable for any one ...
Arthur's user avatar
  • 361
3 votes
Accepted

Software recommendation for writing ebook and exporting to multiple formats

Pandoc is your friend here. Pandoc can take your input file (LaTeX, markdown, other) and transform it to PDF, EPUB, HTML (and many more). Pandoc is cross-platform and free under the GPL, although ...
StandardEyre's user avatar
3 votes

Clean up converted ebook

In Calibre you can play around Heuristic Processing option while converting your files.
Valery Noname's user avatar
3 votes

epubcheck error: mimetype entry missing or not the first in archive

zip -X0 ../myEPUB.epub mimetype zip -9 -r ../myEPUB.epub META-INF OEBPS another common error i was getting was extra characters in mimetype 'Mimetype file should only contain the string 'application/...
Jonathan O'Gorman's user avatar

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