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22 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 ...
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  • 321
18 votes

Trouble hooking up Goodreads with sideloaded ebook on Kindle Paperwhite

I have found the best way to get it 100 percent working is this: If your book is not already in AZW3 format then convert it. (Has to be AZW3 and not just AZW.) Secondly, highlight the book and edit ...
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11 votes

Are there any WYSIWYG editors for EPUB books?

Brackets.io As a suggestion, I have been enjoying using Brackets to create epubs on my Mac. Procedure Unarchive your epub into a folder (change the extension to .zip, and extract). Open Brackets, ...
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  • 474
10 votes

Trouble hooking up Goodreads with sideloaded ebook on Kindle Paperwhite

Get the Quality Check plugin for Calibre and then use it's "Fix -> Fix ASIN for Kindle Fire" feature. It expects that you have the Amazon ID in the book's metadata somewhere, which should be there if ...
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9 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,...
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8 votes
Accepted

Calibre ignoring font settings?

If the ebook contains some definitions about the fonts to use, it takes the precedence over the default Calibre settings. Maybe the ebook you are reading has some CSS rules that define the default ...
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  • 6,066
7 votes

Calibre ignoring font settings?

Some EPUBs may have font information specified directly as inline CSS. It will have preference over more generic options. In that case you can convert eBook and strip font-related styling:
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  • 171
7 votes

Calibre ignoring font settings?

The most canonical way to set styles globally is to set them in the Styles section. The basic set of styles for changing fonts are simply: body { font-family: Crimson; } h1, h2, h3, h4, h5, h6 { color:...
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  • 171
7 votes
Accepted

Ebooks file naming scheme -- Books in a series

If you are using Calibre, its database is already set to have each piece of information about a book in its proper field (i.e., there will be a field for the title, another for the author, another one ...
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  • 6,066
5 votes
Accepted

How to prevent Calibre replacing my cover image

Calibre has had an option to insert a cover long before it offered editing some ebook formats. That option comes with additional utilities of finding a fitting cover using some internet services. If ...
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  • 7,631
5 votes
Accepted

Kindle doesn't show cover

The PDF file format does not support cover images. PDF was designed to show a faithful representation of printed pages. Reflowing text to other page sizes typically is not possible; you should use ...
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  • 181
5 votes

Calibre: Author with the word "and" in the name?

You can change default behaviour in Preferences/Tweaks: # Splitting multiple author names The default setting is: authors_split_regex = ',?\s+(and|with)\s+' When you clear that, Calibre won't split ...
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  • 51
5 votes

How to effectively manage ebooks using Calibre?

As written in the Calibre manual you should use tags: But suppose you want to find all unread science fiction books. There’s no easy way to do this with this folder scheme, [...] In calibre, you ...
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5 votes
Accepted

How to effectively manage ebooks using Calibre?

Calibre organises the books that way, there isn't much you can do about it. If you want to use it, you must accept that folder structure. Anyway, books are better categorised by using tags and other ...
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  • 6,066
5 votes
Accepted

Can I only transfer files to my Kindle Paperwhite using the cable that shipped with the device?

Additionally, there are some USB cables that are with charge-only feature. They have less pins, usually a lot cheaper or come with devices that are not made for a pc-device storage connection. For ...
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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 ...
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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 ...
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4 votes

Can I create my own ebook cloud with Calibre?

Alternatively, if you have a server available, with PHP, you can install COPS (https://github.com/seblucas/cops/releases) on the server, and use rsync to regularly copy your entire Calibre directory ...
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  • 482
4 votes

Is it possible to share annotations between a Kobo Glo and Calibre Viewer?

Apparently Calibre does already have the capability to capture the annotations from Kobo. When Kobo is attached to your computer, the "Send to Device" logo appears as a menu option in Calibre. If ...
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  • 41
4 votes
Accepted

Calibre: Author with the word "and" in the name?

I use Calibre 2.20 and I find, that if you forego using the "Edit metadata" button and just click on the Author field in the main window and edit the name there, you get to keep the "and". If you ...
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4 votes

Trouble hooking up Goodreads with sideloaded ebook on Kindle Paperwhite

Here is a simplified solution for you. • Add your book to Calibre • Convert it to .azw3 • Download metadata for the right version • Make sure in the "ids" box you have the id from amazon.com (as ...
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4 votes
Accepted

How to delete Calibre ePub bookmarks

There's a plugin called Modify ePub which could remove Calibre bookmarks. But I haven't tried it myself.
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  • 156
4 votes

How can I make mathematics look good in ebooks?

I believe that tex4ebook auto-converts from LaTeX to ePub using SVG for math. Looks a little complicated to set up, though. (I haven't tried it personally.)
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4 votes

How can I make mathematics look good in ebooks?

For my ebook experiment, I use PNG, via Formula Sheet.
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4 votes

Calibre to Kindle Book Transfer

Increasing font size and spacing is a frequent problem for PDFs, especially for tablets that are 6 inch. PDFs are supposed to be printable documents, and so font size and other things tend to be fixed ...
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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="...
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  • 141
4 votes

Can a custom column with "Date" type be added to the tag browser?

Yes, you can accomplish that using SubGroups in Calibre. The way to do a subgroup is described here (for user entered Genres) but I'll do the TL;DR below for how to do it with publication dates: https:...
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  • 141

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