Kindle KFX DRM Remove Failed and Solution [Updated 2020]

As the Amazon wants to build its own digital ecosystem, employing Kindle KFX DRM to all books becomes a trending. Since more and more Kindle eBooks have been encrypted with Kindle KFX DRM, Epubor Ultimate has been released as the first tool on the market to remove Kindle KFX DRM. Few users may come across the “Kindle KFX DRM Remove failed” issue when using Epubor Ultimate or any other eBook DRM Removal tool. If you are failed to remove Kindle KFX DRM, you may be disappointed at Epubor Ultimate or you may even uninstall it to express your discontent. We cannot blame our customers for uninstalling Epubor Ultimate, but we do try our best to figure out what causes the failure.

After testing Epubor software and analyzing the bug reports from our users, one clearly thing is that the “Kindle KFX DRM removing failed” issue is mainly caused by mal-operation. In this article, I will list the reasons that may cause the Kindle DRM removing failure and how to remove Kindle KFX DRM successfully with Epubor Ultimate.

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Handle Kinde for PC/MAC Version 1.25 or
Kindle eInk Device with Firmware 5.10.2 (or Higher)

Recently, Amazon have officially released its new Kindle for PC/MAC (version 1.25 ) by automatically recommending user updating software internally. So does the Kindle eInk devices has been updated to firmware 5.10.2. So if you guys has updated your Kindle for PC/Mac to version 1.25 or later version, you will fail to remove Kindle DRM with Epubor Software. Epubor team is working hard on this issue and trying to figure out a solution.

Let’s see what the Kindle for PC/MAC 1.25 and Kindle firmware 5.10.2 brings to us and how to remove new Kindle KFX DRM. Maybe, we can call it Kindle KFX version 2.

How to remove DRM from Kindle KFX eBooks downloaded via Kindle for PC/MAC 1.25?

Amazon has updated its Kindle desktop application with only minor functional updates. Under the official revealed updates, there is a major change that Amazon did to all KFX eBooks which is Amazon has employed the much harder DRM scheme to thier KFX format ebooks. Therefore, if you download eBooks via Kindle for PC/MAC 1.25.X, you will be failed to remove Kindle KFX DRM. Epubor Team is the first one to get the update news and the new kindle kfx DRM information from customer’s report. We should thank all of our customers for their patience and trust.

Currently we offer an alternative way to remove Kindle KFX DRM. This solution will help you you remove DRM from Kindle eBooks. Here I will show you how to on Windows computer. If you are using Mac computer, the steps are the same. You can also automatically downgrade kindle for PC/MAC with Epubor Ultimate.

Step 1

De-register your Kindle for PC/MAC 1.25. Run Kindle for PC. Go to Tools–>>Options–>> Registration–>>click on “Deregister”.

de-register kindle for mac

Step 2
In the new pop up window, just tick the box before “ I understand…this device.” and then click on “Deregister” finish the deregister process.

de-register kindle for pc

Step 3
Uninstall the Kindle for PC/Mac 1.25 and install the older version. Here is the link for older Kindle desktop version.

Download Kindle for PC version 1.24
Download Kindle for Mac version 1.23

Reminder: please stop the Kindle for PC/Mac automatically update manually. Go to Kindle desktop app–>>Tools–>Options–General–Uncheck the automatically install updates option.

stop kindle desktop application upgrade automatically

Step 4
Run the old version of Kindle for PC/Mac, and re-download your Kindle books. Then run Epubor Ultimate to remove Kindle kfx DRM. The Kindle book will be decrypted successfully this time.

remove kindle kfx drm on pc/mac

Note: If your MacOS has been updated to Catalina 10.15 or Big Sur, kindle for mac 1.23 will no longer run on your Mac. That’s because Macos10.15 only supports 64 bits application but Kindle for Mac 1.23 is 32 bits. But you can follow the ultimate ways to remove Kindle DRM on MacOS 10.15 Catalina or Big Sur to get your problem solved.

If you don’t want to downgrade kindle for pc/mac to older version, you can just disable kindle kfx format support in Kindle for PC/MAC.

2. New feature of Kindle firmware 5.10.2 & solutions to remove new Kindle kfx DRM 2020

From the official what’s new in Kindle firmware 5.10.2, I see nothing new in the new firmware. I am definitely sure this is Amazon’s tricky to add the harder DRM to Kindle books downloaded via Kindle e-ink devices.

Anyway, we have the step-by-step guide to teach you how to stop Kindle update. Follow this guide, and you will never get the Kindle kfx ebooks with harder DRM. If you already have installed the latest updated 5.10.2, here are two solutions for you.

Solution 1: Download Kindle books via old Kindle for PC/MAC, and run Epubor Ultimate to remove kindle kfx DRM.

Solution 2: Download Kindle books and transfer via USB to avoid Kindle kfx format and run Epubor software to remove Kindle DRM.

General Reasons and Solutions for Kindle KFX DRM Removing Failure

First thing to check: What’s the Kindle for PC/MAC version installed on your computer?

If your kindle for PC/Mac version is 1.25 or even higher, it is no surprise that you fail to remove Kindle DRM. To fix this issue, please downgrade Kindle for PC/MAC to older version. Then run Epubor software to remove the DRM. Kindle DRM will be removed successfully.

1
You are not using the latest version of Epubor Ultimate.

Please ensure you are using the latest version of Epubor Ultimate because Epubor team regularly update the Epubor Ultimate to crack the latest DRM scheme. What’s more, it is free to update Epubor software. Why not update it to the latest version?

You must be curious if you are using the latest version of Epubor Ultimate. Please run Epubor Ultimate, then click on gear icon at the top right corner and then you will go to the settings interface. Click on “Help”, then click “check up” , and you will see there is an “update” button. If it is in gray color, you are using the latest version. Otherwise, you will need to click on “update” button to update it.

update epubor ultimate

Or you can download the latest version of Epubor Ultimate here:

2
The Kindle books are not purchased via your own Kindle account.

The eBooks you want to remove the DRM should be purchased via your own Amazon account. In other words, you should be the owner of this book.

What kind of Kindle books are not supported by Epubor Ultimate?

Sample booksThe books are titled like XXXEBSP.KFX or XXXEBSP.AZW are sample book which are not supported. Epubor Ultimate are not promise to support sample books, but can handle some of them.

Rented booksIf you rent this book, you may fail to remove the DRM from this Kind of eBooks.

Kindle Unlimited Subscription BooksMany users have purchased the Kindle unlimited subscription service. Of course you can download many book freely, but do not try to use Epubor Ultimate to remove DRM from this kind of ebooks. You are not the owner of these books, but just can read them in the subscription time. It is another kind of rented books.

Kindle eTextBookKindle eTextbooks are with different kindle drm which are much tougher so there is no way to remove DRM from this kindle of kindle books.

Books not from your own accountEvery now and then, you may receive some books from others. When you try to decrypt this kind of Kindle eBooks, you will face “Kindle DRM Remove failed” issue. That’s because you cannot generate the Epubor key file to decrypt these books without your friend account information.

3
You may not register your Kindle for PC/MAC at your computer.

Some users may deregister their Kindle for PC/Mac after downloading the books. In this situaion, you will be failed to remove Kindle DRM.

Solution:
Please ensure your Kindle for PC/MAC are registered even if you have finished the downloading. If you really want to de-register your Kindle for PC/MAC on your computer, you can do it after the DRM has been removed from your Kindle books.

Frequently Asked Questions

Q: Can I remove Kindle kfx DRM from Kindle devices?

Epubor Ultimate can handle books downloaded via Kindle device, not including Kindle Fire Tablet, but only Kindle e-ink devices. In this situation, you only have to plug your Kindle device to your computer. Then Epubor Ultimate will detect the Kindle Serial Number and use it to generate key to decrypt your Kindle books.
Detailed Guide>> How to Remove DRM from Kindle KFX eBooks downloaded via Kindle e-Ink devices.

If your Kindle firmware has been updated to 5.10.2 or later, you are not able to remove DRM from Kindle books downloaded via these devices. Just follow the solution for Kindle firmware 5.10.2 to fix this issue.

4
You move your Kindle eBooks to other folder without the full content.

Some people move their books to the desktop for removing DRM. This is really unnecessary as Epubor Ultimate can dectect your default “My Kindle Content” folder and display the books in the left column. The big difference between Kindle old format and the Kindle KFX format is the Kindle KFX ebook is consisted of a series of files and stored in one folder. So if you want to remove DRM from Kindle KFX ebooks on your desktop or other folders, please ensure you have the whole Kindle KFX eBook folder, not only a file with the extension of azw or kfx.

If the above 4 situations are not applied to you, you can also try the below method to solve your “Kindle KFX DRM Remove failed” issue.

5
The failure may be caused by computer environment.

We know computer system environments are various and some special computer environment will also cause the failure of removing Kindle KFX DRM. Although this possibility is quite slow, we still provide the solution to this situation.

1
Solutions for Windows system

Step 1: Clear the cache of Epubor Ultimate. Please delete the .ultimate folder. You can find it here: C:UsersusernameAppDataRoaming.Ultimate.

Step 2: Please delete Epubor_keys folder. You can find it here: C:Usersusername.Epubor_Keys.

Step 3: Then run Epubor Ultimate to remove the DRM. If you are failed again, please delete the failed books and redownload them again. Run Epubor software to remove the DRM.

2
Solutions for Mac system

Note:
If your computer has been updated to Mac 10.15 Catalina, you can just follow the ultimate guide to remove kindle drm on Mac Catalina and Big Sur.

If you are on Mac, it will be slightly different.

Step 1. Delete all content Kindle content folder

Open terminal, and then copy this command rm -rf ~/Library/Application Support/Kindle/storage to the terminal and then press on “enter” to delete all files in Kindle content folder.

Open the terminal and copy the following command to the terminal rm -rf ~/Library/Containers/com.amazon.Kindle/Data/Library/Application Support/Kindle/storage and then press on “enter”.

Then copy this command rm -rf ~/Library/Application Support/Kindle and press on “enter” again.

If you have changed the directory of Kindle content folder, you have to find the folder and delete all the files manually.

Step 2. Please also delete the Epubor Key file at your Mac. You can find it here: You can find the Epubor Key files here: Mac: /Users/system user/.Epubor_Keys/

Step 3. Redownload the books and run Epubor software to remove the DRM

Now you only have to re-sync your Kindle books and run Epubor Ultimate to remove the DRM.

Ultimate Ways to Remove Kindle KFX DRM

If above solutions cannot fix your problem, here I want to share the ultimate way to help you remove Kindle DRM.

Ultimate way
Download and Transfer via USB

Please note: Please ensure you have at least one Kindle eink device and this device is registered with your Kindle account.

Do you know that Amazon allows you to download Kindle books and transfer via USB from its online library? Why not download the Kindle books directly from the Amazon website and remove the DRM. An article on our website has given you detailed guide about downloading Kindle eBooks from Amazon website directly and removing Kindle AZW3 DRM–Download &Transfer Kindle Books via USB and Remove Kindle DRM. I am sure you will get your problem fixed by this method.

Get Assistance from Epubor Support Team

Epubor team offers various access to Epubor Support Team for helping our customer fix their issues and inquiries. If the all above mentioned solutions cannot fix your issues, please feel free to contact Epubor Customer Service Center via following methods:

1
starting a live chat;

2
open a ticket;

3
email to us;

4
skype: epubor.iris@outlook.com.

Epubor team will get back to you within 24 hours and try our best to help you fix your problem as soon as possible.

More tips & tricks for Kindle KFX eBooks:

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