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Old 09-04-2025, 09:22 AM   #1
Phssthpok
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KFX to EPUB: "locked by DRM"
Trying to convert KFX to EPUB, this is what I get:

calibre, version 8.5.0
Cannot convert...
This book is locked by DRM.

I have the KFX Input plugin, the latest (10.0.9) DeDRM plugin, and my Kindle serial number is set correctly in the plugin config.

What do I need to do to make this work?
Last edited by Phssthpok; 09-04-2025 at 09:32 AM.
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Old 09-04-2025, 09:30 AM   #2
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Quote:
Originally Posted by Phssthpok View Post
Trying to convert KFX to EPUB, this is what I get:

calibre, version 8.5.0
WARNING: Could not convert some books: Could not convert the book because no supported source format was found

B09DZ5FG62 - No supported formats (Available formats: kfx)

I have the latest (7.2.1) DeDRM plugin, and my Kindle serial number is set correctly in the plugin config.

What do I need to do to make this work?
the latest dedrm is v10.0.9 (and a newer autorelease)
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Old 09-04-2025, 09:32 AM   #3
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Not to mention that KFX is not a natively supported format in calibre you need to install the KFX input plugin.
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Old 09-04-2025, 09:33 AM   #4
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Quote:
Originally Posted by bustacap View Post
the latest dedrm is v10.0.9 (and a newer autorelease)
Sorry, I found 10.0.9, updated, and then updated my original post.
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Old 09-04-2025, 09:34 AM   #5
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Quote:
Originally Posted by Phssthpok View Post
Trying to convert KFX to EPUB, this is what I get:

calibre, version 8.5.0
Cannot convert...
This book is locked by DRM.

I have the KFX Input plugin, the latest (10.0.9) DeDRM plugin, and my Kindle serial number is set correctly in the plugin config.

What do I need to do to make this work?
what method did you use to get the book into calibre? (like the kindle pc app, android, a physical kindle, etc and what menu did you use to import)
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Old 09-04-2025, 09:35 AM   #6
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Quote:
Originally Posted by kovidgoyal View Post
Not to mention that KFX is not a natively supported format in calibre you need to install the KFX input plugin.
OK, installed KFX Input, DeDRM 10.0.9, restarted, reimported book... still no luck, "locked by DRM".
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Old 09-04-2025, 09:36 AM   #7
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Quote:
Originally Posted by bustacap View Post
what method did you use to get the book into calibre? (like the kindle pc app, android, a physical kindle, etc and what menu did you use to import)
Went to my Kindle, copied the book file to disk, imported into Calibre via drag&drop.

Update: I had used Calibre to save the book from the Kindle. Now I went directly to the Kindle document folder and dragged from there to Calibre, and it worked.

Sorry for all the confused posts.
Last edited by Phssthpok; 09-04-2025 at 09:39 AM.
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Old 09-04-2025, 09:38 AM   #8
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Quote:
Originally Posted by Phssthpok View Post
Went to my Kindle, copied the book file to disk, imported into Calibre via drag&drop.
try this instead: start calibre and connect your kindle over usb.
there should be a "device" menu in the main toolbar, click on it. you should now get a list of all the books on your kindle.
right click a book you want to import and select "add books to library"

then try again with the from kfx menu
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Old 09-04-2025, 05:49 PM   #9
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Hi folks, i'm using the kindle app for mac OS, and have just installed calibre, KFX Input and DeDRM 10.0.9 plugins, restarted, then selected my book from my kindle folder (below), clicked on convert and tried to output to PDF, but get the dreaded "locked by DRM" error like others have mentioned. What am i doing wrong?
Quote:
~/Library/Containers/com.amazon.Lassen/Data/Library/eBooks/B0FD31459Y/4A8A4B67-6B03-4EA0-BA26-C2294CF125E3/BookManifest.kfx
Last edited by bigred247; 09-04-2025 at 05:52 PM.
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Old 09-04-2025, 05:55 PM   #10
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I also tried outputting to EPUB but this errored with the same
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Old 09-04-2025, 05:57 PM   #11
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Kindle for Mac no longer works for deDRMing.
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Old Yesterday, 03:34 AM   #12
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Quote:
Originally Posted by bustacap View Post
right click a book you want to import and select "add books to library"
That was probably my mistake -- I chose "save book to disk" instead. However, all's well that ends well.
Last edited by Phssthpok; Yesterday at 03:37 AM.
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Old Yesterday, 04:53 AM   #13
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For new Kindle eBooks, you will need Kindle Reader in order to be able to download eBooks that you can then remove the DRM.
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Old Yesterday, 06:08 AM   #14
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Quote:
Originally Posted by Sirtel View Post
Kindle for Mac no longer works for deDRMing.
@Sirtel
Thank you for the reply. I also have a Windows laptop and desktop PC - will it work?
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Old Yesterday, 06:11 AM   #15
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Originally Posted by JSWolf View Post
For new Kindle eBooks, you will need Kindle Reader in order to be able to download eBooks that you can then remove the DRM.
@JSWolf
When you say "Kindle Reader" i'm assuming you mean the physical device? So, i'm also presuming that new eBooks can only be downloaded onto a Kindle Reader and Mac/Windows are not supported? But if i'm reading older eBooks say pre Dec 2023, can I still use the Windows laptop/desktop?
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