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How to Convert Kindle KFX to Epub/PDF/Mobi with Calibre

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A terrific good news for loyal Calibre users is last week Apprentice Alf released a new version of the DeDRM tools with added support for KFX format, so now you can easily import KFX books to Calibre to remove KFX DRM in order to create backups and convert them to other formats. So in this article I am going to show you how to remove DRM from KFX books and convert KFX to Mobi/Epub/PDF step by step.

How to Convert Kindle KFX to Epub/PDF/Mobi with Calibre

The DeDRM Calibre plugin is intended to help anyone looking for free software for removing DRM from their purchased Kindle KFX ebooks. But we have to admit that the biggest inconvenience about using Calibre to remove DRM is that you have to install De-DRM Plugin and KFX Conversion Input Plugin to Calibre fisrt. And this is also the most difficult and also indispensable part to use Calibre to convert DRMed KFX books to Epub/PDF/TXT...

Step 1download Calibre to your computer and launch it.

Step 2download DeDRM_tools and KFX Conversion Input Plugin to your computer.

Step 3load DeDRM Calibre Plugin and KFX Conversion Input Plugin to Calibre.

Open calibre's Preferences dialog. Click on the Plugins button. Next, click on the Load plugin from file button.

calibre plugin load dedrm tool

Navigate to the unzipped DeDRM_tools folder and, in the folder DeDRM_calibre_plugin, find the file DeDRM_plugin.zip. Click to select the file and select Open.

dedrm calibre plugin1 dedrm plugin zip

Click Yes in the "Are you sure?" dialog box. Click the OK button in the "Success" dialog box.

calibre yes calibre ok

Then repeat the same operation to load the zipped KFX Input folder to Calibre.

The loaded DeDRM plugin will be displayed under File type plugins.

dedrm location

And the loaded KFX Conversion Input Plugin will be displayed under Conversion input plugins.

conversion input plugins

Step 4add Kindle KFX books to Calibre by clicking Add books in the tool bar.

You need to download KFX books with Kindle for PC/Mac or Kindle e-ink Reader first, then add KFX books from My Kindle Content folder or the Kindle's Document folder to Calibre manually. The book will be decrypted soon after you add it to Calibre library.

convert books1

The KFX books downloaded with Kindle for PC/Mac will be saved in .azw format.

kfx content Pc

While the KFX books downloaded with Kindle device will be saved in .kfx format.

kfx content device

When you add KFX books to Calibre library, please make sure that your know exactly where your downloaded KFX books are stored on your computer.

If your KFX books are downloaded to your computer with Kindle for PC/Mac, you need to add KFX books to Calibre library from My Kindle Document folder.

add kfx from my kindle document

If your KFX books are downloaded with Kindle e-ink Reader, then you need to add KFX books to Calibre library from Kindle’s Document folder.

add kfx from kindle document

Step 5Convert KFX to Epub/Mobi/PDF

Click Convert books in the tool bar and choose Epub/Mobi/PDF/AZW3/TXT... as the output format and click OK to start the conversion.

convert kfx to pdf with calibre

The book will have two formats for you to choose from after the conversion.

converted epub file calibre

Note: Though Calibre can remove DRM from KFX books , it still can't open decrypted KFX books.

How to Convert Kindle KFX to Epub/PDF/Mobi without Installing Plugins

Epubor Ultimate is the first software to declare that it can remove DRM from KFX books not long after Amazon adopts the latest the KFX format. Epubor Ultimate equals an eBook DRM Removal and eBook Converter, which makes it super easy and convenient to decrypt and convert a bunch of books to EPUB, PDF or Mobi with just 2 clicks.

Step 1download Epubor Ultimate to your computer and launch it.

Download Epubor Ultimate for Free

Step 2download your KFX books to your computer with Kindle for PC/Mac. Or you can simply connect your Kindle e-ink device to your computer after you have downloaded the KFX books to your Kindle device.

Note: One cool thing about Epubor Ultimate is that it can automatically detect your downloaded KFX books in the left sidebar under Kindle or E-ink Device column.

Step 3add the KFX books from the left to the right main window to remove DRM.

epubor decrypt kfx

Step 4choose PDF/Epub/Mobi/TXT/AZW3 as the output format and click Convert to PDF/Epub/Mobi/TXT/AZW3 to start the conversion.

epubor kfx to pdf

If you have used Epubor software before, you should know what Epubor software is capable of. If you haven't used Epubor software before, now you can use the trial version to try it out by yourself.

Besides converting DRMed KFX books to Mobi/Epub/PDF using the above methods, you can also convert DRMed Adobe DRMed and other Kindle DRMed books to Epub/Mobi/PDF... using the two powerful tools.

Calibre VS. Epubor Ultimate

Calibre is an open source freeware ebook library manager. It is the best tool around for keeping track of your ebooks. The DeDRM plugin for Calibre provides a free way to remove DRM from your Kindle and Adobe DRM ebooks. Though Epubor Ultimate is a paid software, it has absolute advantage over Calibre. First of all, you don't have to download the DeDRM plugins and the KFX Conversion Input Plugin. This could be a pain in the ass if you are a tech newbie. Second, Epubor Ultimate supports removing DRM from KFX books downloaded from Kindle e-Ink Reader. Third, Epubor Ultimate can automatically detect all of your downloaded Kindle books, so you don't need to add your downloaded KFX books to the software manually.

In a word, Calibre is not as easy as Epubor Ultimate, it's a little difficult to handle for some people who is not skillful. Epubor Ultimate can definitely save you a lot of trouble by converting DRMed books to Mobi/Epub/PDF... So it totally worths your money. And if you are not satisfied with Epubor software, you can get your money back within 30 days after you place the order.

Top Tips: both calibre and Epubor Ultimate can’t remove KFX DRM if the Kindle books are downloaded from v1.25 or above Kindle desktop app. So we suggest you downgrade your Kindle app to an older version instead in order to decrypt Kindle books smoothly. And if you are using the latest macOS 10.15 Catalina, we suggest you use Epubor KCR Converter to export your Kindle books from Kindle Could Reader directly.

Conclusion

Comparing Calibre with Epubor Ultimate, to be honest, both tools have their own advantages. But Epubor Ultimate makes it more efficient and convenient to remove DRM from KFX books and convert KFX to Mobo/Epub/PDF... If you have little knowledge about computer, we strongly suggest you use Epubor Ultimate to solve your problem directly with simply 2 clicks.

Download Epubor Ultimate for Free

 

author

Hillary Zhang works for Epubor and writes articles about eBooks and eReaders. She seeks the methods to read eBooks more freely and wants to share all she has got with you.

16 Comments
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06/23/2018 22:18:17
V. helpful!  Worked like a charm -- TY!
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05/31/2019 13:18:07
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12/5/2018 04:56:37
that worked great
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12/5/2018 08:47:13
We are glad to know that this method works great.
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12/6/2018 19:45:17
great, thank you very much!
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12/7/2018 15:21:07
Thank you for your comments. We are glad to know this article can help you.
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12/19/2018 19:45:13
no longer works leaves file in KFX-ZIP and still with drm on it
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12/20/2018 14:13:32
Please ensure you are using the Kindle for pc/mac version before 1.25 to download the Kindle kfx ebooks. Then run Epubor Ultimate to remove the drm, I am pretty sure it works fine. If you can not figure out how to do it, please contact our customer service support@epubor.com to get more assistance.
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01/29/2019 05:14:44
yup- doesn't seem to work with v1.25 - i get same result as above. DRM not removed
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01/29/2019 14:29:32

Hello,

Yes after Kindle desktop v1.25 and firmware 5.10.2 released, amazon kindle changed their drm scheme technology, which results in drm removing failed.

You'd better downgrade your Kindle for PC/Mac to 1.24(1.23) and STOP auto-update.

Then, use either Epubor or Calibre to help you.

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05/9/2019 04:54:56
Thank you very much for the guidelines and tips given. The end results is marvelous. Now I can read my Kindle books easily on my android phone.
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05/9/2019 10:21:56
Glad to know that you like this guide. If you think this guide is helpful, please share it!
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06/4/2019 18:44:52

Hello,
I have followed the process above. However, when I am going to convert the file kindle, I received the message " cannot covert the ...." This book is locked by DRM...

What did I do wrong?

ps: I had downloaded the last versions of  DeDRM_tools and KFX Conversion Input Plugin.
I am going to enrol a Master and most of the books are in Kindle format.


Thank for your help.

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06/5/2019 09:00:00
If there is the error message "..locked by Kindle drm", that means your book are not decrypted. Please follow the instruction again. I know this is a little bit difficult. Also, you can download Epubor Ultimate to remove Kindle drm and convert it to any other format. This software is easy to use.
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06/24/2019 08:09:15
Thanks, man. Worked like a charm. As I dowloaded from my eInk device, just configured the plugin with the serial number and bam! ePub done! :)
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06/24/2019 08:49:58
Thank you for your comments.
Have a nice day!
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