How to Remove Kindle KFX DRM and Convert KFX to PDF/EPUB

More and more Kindle books have been encrypted with Kindle KFX DRM nowadays. No matter the books downloaded via Kindle for PC/Mac (version higher than 1.17) or Kindle e-ink device (firmware higher than 5.6) are all in Kindle KFX format. To read Kindle books more freely, sometimes we may need to remove the Kindle KFX DRM and convert KFX to PDF/EPUB.

So in the blog, I’m going to share you with a much powerful Kindle KFX DRM Removal — Epubor Ultimate—to help you convert KFX to PDF/EPUB.

How to remove Kindle KFX DRM and convert KFX to PDF/EPUB?

Earlier in 2019, Amazon has released a new Kindle KFX DRM. Your Kindle eBooks will be encrypted with this new Kindle KFX DRM if you download Kindle eBooks via Kindle for PC/MAC version 1.25 or higher, or Kindle device with firmware higher than 5.10.2. Until now neither Epubor nor Calibre is able to help us remove DRM from such books with the new Kindle KFX DRM. Therefore, here you can follow me to install a lower version of Kindle for PC/Mac to redownload the Kindle books.

You can first watch a video guide here.

Step 1. Downgrade the Kindle for PC/Mac to version 1.24/1.23

Notice: Please stop the Kindle for PC/Mac automatical update manually. Open Kindle desktop app →Click “Tools”→Options →General →uncheck the “Automatically install updates when they are available without asking me”

stop automatical update

Step 2. Download Kindle KFX books via Kindle for PC/Mac

Launch the Kindle for PC/Mac and sign in with your Amazon account. You will find all your purchased Kindle books in the library. Just right-click the book cover to download the Kindle books to your computer.

download Kindle books via Kindle for PC/Mac

After the download has been finished, the Kindle KFX eBooks you downloaded are not with the extension .kfx, but .azw. The downloaded kindle books are usually saved in “C:/Users/User name/Documents/My Kindle Content”.

Step 3. Run Epubor Ultimate to remove Kindle KFX DRM

Run Epubor Ultimate, the books you have downloaded via Kindle for PC/Mac will be automatically detected by this software by showing under the Kindle tab at the left column.

What you need to do now is to just drag and drop the books from left to the right main window. Then the DRM will be removed immediately with a “Decrypted” word showing.

remove Kindle KFX DRM

Step 4. Convert Kindle KFX to PDF/EPUB

When the DRM is removed successfully, now we can click the blue “Convert” button at the bottom to convert Kindle KFX to PDF/EPUB. Or you can set the output format as mobi/azw3 to convert KFX to DRM-free mobi/azw3.

convert KFX to PDF

In a second, the conversion is completed. You will see a “Succeeded” under each book title. And you can click the “Succeded” word to find the converted Kindle KFX books in PDF/EPUB format.

successful KFX to PDF conversion

Friendly Tips: If you have a Kindle e-ink device, you can directly connect your Kindle to the computer via USB and Epubor Ultimate will automatically detect your downloaded Kindle KFX books. Just drag the books from the left to the right column and the KFX books are decrypted immediately.

Notes: For Kindle KFX eBooks downloaded via Kindle firmware 5.10.2 or higher version have been encrypted with a new KFX DRM scheme, you may fail to remove this Kind of Kindle KFX DRM by taking this method.

In this occasion, the recommended solution for you is to use Kindle for PC/Mac 1.24/1.23 to download the Kindle KFX books and remove KFX DRM — Which I have already told you in the above-detailed steps.


Question 1. Can I remove DRM from Kindle KFX books and convert KFX to PDF/EPUB with calibre?

Answer: Yes, you can remove KFX DRM with calibre. But you should install and KFX Input Plugin to remove DRM from eBooks.

Question 2. Why I failed to remove KFX DRM with Calibre DRM Removal plugins?

Answer: The DRM removal plugins for KFX format only works with books from Kindle for PC/Mac versions 1.19 through 1.24.3 and e-ink Kindle devices with firmware versions 5.6.5 through (Older versions do not support KFX and newer versions use a new, unsupported DRM scheme.)

Calibre DRM Removal Plugins Pros and Cons:

Pros: Free to remove Kindle KFX DRM

Cons: Difficult to use and install the plugin especially we need it to remove DRM from eBooks; no customer support to help you solve technical problems.

Key Features of Epubor Ultimate:

1. Super easy-to-use interface and design.

2. It can handle 99% eBooks on the markets, including removing DRM from eBooks purchased from Amazon Kindle, Kobo, Google Play and etc. Its supported DRM schemes include Kindle DRM, Kindle KFX DRM, Kobo DRM, Adobe Adept DRM.

3. Automatically detect device and load books.

4. Provide 24/7 customer service letting you get a response within 24 hours.

Compared with Calibre, I would say Epubor Ultimate is a much easier-to-use eBook DRM Removal and eBook converter to help you deal with Kindle KFX books.

You can buy Epubor Ultimate with 10% off here:

Epubor Ultimate for Win
Epubor Ultimate for Mac

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