Kindle books typically include DRM protection, with KFX now being Amazon’s standard eBook format. This article explains the KFX format and offers a step-by-step guide to removing DRM and converting KFX to PDF.
1. What is KFX Format?
Most Kindle books downloaded through the latest Kindle app or device use the KFX format, Amazon’s successor to AZW3. KFX (Kindle Format 10) integrates the book's text and metadata, offering enhanced typesetting features like hyphenation, improved character placement, better word spacing, and more flexible page layouts and margins.
2. How to Remove KFX DRM
Epubor Ultimate is a powerful and user-friendly DRM removal tool designed to effortlessly remove KFX DRM. It supports converting eBooks into multiple formats—including EPUB, PDF, MOBI, AZW3, DOCX, and TXT—offering maximum flexibility and convenience for your reading needs.
Step 1Download and Install Epubor Ultimate
Step 2Download Kindle Books
Kindle DRM Removal Limitations(Updated 6/5/2025):
Windows Users:
-Only Kindle books downloaded via Kindle for PC v2.4.0 can be decrypted using: Calibre DeDRM Plugin + KFX Input Plugin
-New Restriction: Books published after April 22, 2025 require the latest Kindle for PC version, which is incompatible with current DRM-removal tools.
Mac Users:
-Kindle for Mac v1.40 (previously compatible with Calibre plugins) is no longer supported by Amazon.
-The latest Kindle for Mac versions are not compatible with DRM-removal plugins.
Solutions:
• For Windows users: download Kindle for PC version 2.4.0 and re-download your Kindle books published before April 22, 2025 to remove DRM. For Kindle books published after April 22, 2025, please use a Kindle eInk device to download them for DRM removal.
Download Kindle for PC 2.4.0 here
• For Mac users, removing Kindle DRM requires a Kindle e-ink device.After installing the 2.4.0 Kindle app and signing in to your Amazon account, you can start downloading Kindle books.
Must-Know Tip & Trick to Download Kindle Books in Bulk to Kindle for PC
To download Kindle books in bulk to Kindle for PC, go to the Amazon website and find your Kindle books. Check the "Select All" button, then click on the "Deliver or Remove from Device" option.
Next, choose your Kindle for PC account, ensuring it's registered under the same Amazon account.
All the selected books will be delivered to your device. Therefore, Epubor Ultimate can auto detect all your Kindle books.
Note: If your Kindle for PC is version 2.4.1 or newer, you can easily downgrade it to version 2.4.0 using the auto-downgrade feature in Epubor Ultimate. Simply click the provided auto-downgrade link, as shown in the image below.
Step 3Remove KFX DRM
Launch Epubor Ultimate, and any Kindle books downloaded via Kindle for PC will automatically appear under the "Kindle" tab in the left sidebar. Books downloaded using a Kindle eInk device will show up under the "eReader" tab. Tips: You can also click the Kindle icon in the toolbar to auto-detect newly downloaded books.
To remove KFX DRM, simply select the desired titles from the left sidebar and drag them into the main window on the right.
Once the decryption process is complete, a 'Decrypted' label will appear next to the book title. Click the label to access the DRM-free Kindle books, and its location will open on your computer.
Step 4Convert KFX to PDF
After removing Kindle DRM, choose 'PDF' as the output format and click the 'Convert' button to start the conversion process. Once completed, a 'Succeeded' label will appear next to the book title. Click the label to access your DRM-free PDF file.
Conclusion
As Amazon continues to tighten restrictions on downloading Kindle books compatible with third-party tools, now is the perfect time to back up all your Kindle books.
Amy Lopez crafts informative articles on eBooks and eReaders, uncovering optimal methods to enhance your eBook reading experience, and eagerly shares her findings with you.
À chier!
J'ai une license à vie pour epubor KCR Converter for Mac en lifetime license. Ce logiciel n'a été installé que sur mon mac 27". La semaine dernière il me demande renouveller ma licence. Je peux la visualiser ma license sur mon compte epubor ou il est bien stipuler qu'il s'agit d'une license à vie. Mais quand je lance epubor il me demande renouveller cette license.
Le support n'a été d'aucune utilité tout en reconnaissant que j'ai une lifetime license.
Je pense qu'Epubor n'est pas une société honnête.
Please don't worry.
Hi,
I have tried all 3 methods without success.
How about giving those of us who could not get it to work remote directs hands-on support by us given Epubor Ultimate access to our laptops and desktops.
I will gladly give you full access to my laptop, so you can set it up so Epubor Ultimate works on my laptop. You or I can make a screen recording of it, which you can use as a tutorial for others to see on video. (In case I would make a screen recording of it, I can send it to you via Dropbox.)
Doing that for clients who have difficulties making it work would make Epubor Ultimate very attractive to a wide public and result in the best reviews. And it might not give you more work than replying to emails, chats via Skype, or on the above mentioned website page I copied the link to.
I hope you take up my offer to take control of my laptop to set up Epubor Ultimate right as only one of your technical experts knows how. It would be most effective
Doesn't work anymore.
Reached to the support and asked for a refund.
They sent me a link to this page instead.
Still doesn't work and my money is still gone.
This is a joke.
Thank you for using our software. Is there any error message? Doesn't work doesn't mean this software cannot handle kindle books? Our technical staff always want to help our customers to fix issue. So please describe your issue clearly and send them to our customer support via support@epubor.com. You can also reach us via livechat at every page on our website to get instant support. Please don't worry. If your choice is refund, you can also ask for refund. We will help you handle all your requests at the very first time.
Thank you for your understanding.
Thank you