Epubor

Calibre DRM Removal Plugins

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What is Calibre DRM Removal Plugin? Calibre DRM Removal Plugin, known as Alf's DeDRM Plugin tool, is developed to remove DRM from eBooks, including Kindle, Kobo and Adobe DRM. There is no doubt that Calibre's success majorly depends on those varieties of plugins and Alf's DRM Removal plugins are the super stars among them. But many people are saying the Calibre's interface and user-experience are not that friendly for tech noobs. No mention the plugin installation, which would be another challenge for them. To help you use this free DRM Removal plugin smoothly, this article will cover these two issues: how to install DRM Removal Plugin to Calibre on Windows /Mac and how to remove eBook DRM with Calibre DRM Removal plugins.

Part 1. How to Install Dedrm Plugin to Calibre

Step 1. Install Calibre

Calibre is totally free to download and use, click the buttons below you can download the Windows and Mac versions directly.

Download for multiple platforms click here: http://calibre-ebook.com/download

Step 2. Download the DRM Removal plugin

Download the DeDRM Plugin V6.6.3 (released 2 June, 2018) here: http://download.epubor.com/sold/DeDRM_plugin.zip

GUI version for Windows | GUI version for Mac | GUI version for Linux

Step 3. Install the plugins to Calibre

Run Calibre, and click "Preferences" in the top menu bar, then look at the bottom of the new window, you can see "Plugins" in the "Change calibre's behaviour" area.

calibre-advanced-plugins

In the plugins center, please click "Load plugin from file".

calibre load plugin

Find the DeDRM plugin you downloaded in the step 2, and click "Open". The Calibre will warn you about the security risk, click "Yes" to proceed.

calibre-plugin-securiy

Finally you can see the success notification.

plugin-install-success

Back to the Plugin center you can see the plugin information in under "File type plugins".

calibre-drm-remover-plugin

Now the plugin is installed successfully, you can use Calibre to remove eBook DRM.

Part 2. How to Remove eBook DRM with Calibre DRM Removal Plugins

For now, this Dedrm plugin can remove DRM from Kindle eBooks (only downloaded to your kindle desktop application and kindle eink device), Barnes & Noble ePub ebooks (Because Nook has changed its DRM scheme, this DRM plugin does not work for Nook DRM any more.) , any ebooks using Adobe Digital Editions DRM (This includes ePubs from Kobo and Sony that are downloaded for Adobe Digital Editions. I have to mention that many vendors have strength their ADE DRM to force readers to download eBooks via ADE4.5 which may caused the DRM removal failure.), and the older Mobipocket and eReader ebooks.

Detailed stepsRemove DRM from eBooks with Calibre

Step 1. To remove DRM from eBooks, you just need to find your downloaded file and add them to Calibre.

add kindle book to calibre

Step 2. Once the book has been added successfully, DRM will be removed automatically.

remove drm with calibre drm removal plugin

Detailed stepsRemove DRM from Kindle device with Calibre

The above steps show you how to remove DRM from ebook downloaded to your computer directly. If you have books downloaded via Kindle devices, this part will show you how to remove drm from Kindle device with Calibre DRM removal plugin. Please note: Calibre DRM Removal plugin cannot handle ebook downloaded via Kindle device firmware higher than 5.10.2 because they are encrypted with a new Kindle KFX DRM.

Before we start the detailed steps, please find your Kindle serial Number and write it down at first. You will need it later. You can also watch the following video to know how to find a Kindle serial No.

Steo 1. Run Calibre, and find "Preference"-->>Plugins.

customize dedrm plugin

Step 2. Then find "File type plugins"-->>Select " DeDRM (6.6.3) by Apprentice Alf....scripts" and then click on "Customize Plugin".

calibre drm removal plugin

Step 3. A new window will pop up to let you configure your DeDRM. Select "eInk Kindle eBooks" and fill in the kindle serial No. you have remembered at the very begining. Then click on "OK“ button.

fill in kindle serial no.

Step 4. Then go back to the main interface of Calibre and plugin your Kindle device. Find the "Device" option at the top menu and select "Show books in the main memory of the device".

load kindle books

Step 5. All Kindle books from your device will be loaded in. Select the book you want to decrypt, right click the mouse and then choose "Add books to Library" . You will see your selected books has been transferred to the main library of Calibre and the DRM has been removed in this process.

remove drm from kindle device calibre

This process is a little bit difficult, right? Don't worry, follow the bonus tip to learn the easiest way to remove Kindle DRM.

Calibre DeDRM not Working Issue
Q1: DeDRM Kindle not working

A: Calibre Dedrm plugin does not work for Kindle books downloaded via Kindle for PC/MAC higher than version 1.25. So please downgrade your Kindle for PC/MAC to older version. Then use Calibre DRM removal plugin to remove Kindle DRM.

Q2: Can Calibre DRM Removal plugin handle iBooks DRM?

A: This DeDRM tool does not work for iBook anymore.

Q3: DeDRM plugin has installed successfully, but failed to remove DRM.

A: Please ensure the plugin installed is the latest version. You can always find the latest version at Github.

Bonus Tip: Best Calibre DRM Removal Plugin Alternative

Epubor provides a software called "Epubor Ultimate" which can remove DRM from Amazon Kindle, Adobe Adept(including Kobo, Sony and Google eBooks), Barnes & Noble, Mobipocket and eReader eBooks.

Download Epubor Ultimate for free:
   

With this program you need not to download or install Calibre and the plugin. Just download and install the Epubor Ultimate, your books will be automatically detected and displayed at the left column. Drag them from the left to the right column, DRM will be removed at the following picture. Cannot be much easier, right?

epubor decrypt kfx

If you are using the Kindle device, you will not be required to fill in your Kindle serial No. In addition, it only requires you to click one button, then you can remove the eBooks DRM. From all aspects, this way is far more easier than Calibre and the plugins.

  Alf DRM Removal / Calibre DeDRM Plugin Epubor Ultimate
Pros Free;
More functions and features to manage eBooks
All-in-one tool;
Easy to use;
Clean interface;
7/24 Customer service with online livechat
Cons Not easy to use;
No customer service;
Paid software (free trial)

Here maybe you are interested in this video about the Epubor Ultimate.

Download Epubor Ultimate for free:
   
author

joined Epubor since 2011, loves everything about eBooks and eReaders. He seeks the methods to read eBooks more freely and wants to share all he has got with you.

76 Comments
reply
reply
01/18/2014 06:54:01
Thank You!
reply
12/10/2014 12:59:16

If it doesn't work, try to:
1) remove your DRMed books from the library
2) reload Calibre
3) add them again to library

at least this works for me!

reply
12/14/2015 13:34:23
It works in this way. Thanks
reply
04/14/2019 07:20:15

This didn't work for me. I tried this several times.

Does it work with the latest version of Kindle for PC?

(I know that older versions required the older version of Kindle for PC.)

reply
04/15/2019 13:50:49
This plugin does not work with kindle version 1.25 or higher. Please downgrade your Kindle to older version and then use above mentioned method to remove the DRM.
reply
06/2/2019 01:54:39
How do you downgrade your Kindle?
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06/4/2019 09:54:19
Here are two ways to downgrade your kindle for pc/mac: https://www.epubor.com/how-to-downgrade-kindle-for-pcmac.html
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12/19/2015 16:34:54
Thank you. This worked!
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03/23/2016 14:56:15
This worked! So easy, thank you so much!
reply
08/19/2016 04:21:14
Thank you so much! You made my day! Your advice work great
reply
08/3/2017 13:23:29
THANKS!!
This worked!
-- after adding plugin and restarting calibre, remove the ebook and re upload
reply
08/9/2017 09:20:36
We are glad to hear that!
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12/17/2014 20:07:00
El proceso fue fácil y lo logre, pude quitar el DRM
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12/22/2014 05:26:00
Perfect. Everything working. If you have $20, purchasing the Epubor Ultimate (which includes DRM removal as well as eBook converters) is well worth it. It gets rid of DRMed AZW4 files in less than a minute. Drag-drop-done.
reply
04/20/2016 10:48:26
It works perfectly if follow what PuruPuru tells you to do! Thank you.
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05/1/2015 04:15:19

To make it work, do this! (copied from earlier post, Thank you PuruPuru!)

If it doesn't work, try to:
1) remove your DRMed books from the library
2) reload Calibre
3) add them again to library
at least this works for me!

reply
11/11/2017 18:40:08
This is exactly what I did and it worked.
reply
05/4/2015 23:13:47
Does the Mac version work, anyone?
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05/5/2015 22:59:53
Of course you can run it on Mac, if you have installed Calibre.
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06/29/2015 02:23:40
Works fine (win 7 + calibre 2.31[64bit])
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08/18/2015 06:46:41
Gracias tras intentarlo con varios con tus plugins y tus indicaciones lo he conseguido.
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09/16/2015 02:09:33
Works fine :-)
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10/15/2015 04:43:46
Good Job. works fine for drm solved epubs.
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11/24/2015 05:45:41
Excelente!! Thanks.
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12/6/2015 04:17:48
Pure magic, solves the issue of problem authors on Amazon that don't understand the purpose of a book.
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01/18/2016 09:30:44
The Calibre DeDRM plug-in and Epubor software work well on Win7 64-bit.
You MUST have Kindle for PC/Mac/etc. installed and activated on your PC before either the plug-in or Epubor software will remove the DRM from Kindle books.
If you download other e-books, you must have Nook for PC, Adobe Digital Editions, Kobo Reader, etc. installed for either approach to work.  Both software solutions rely on being able to access YOUR account credentials which were used to encrypt the e-book you have downloaded. This is the only way the e-books with DRM can be decrypted.  Note: This prevents sharing e-book files with intact DRM.
The documentation for DeDRM and Epubor both explain this.  If you can't use these solutions, you probably didn't read the documentation.  Everything is very well spelled out.
Also, Kindle books with DRM that are already added to Calibre must be removed and reloaded for the plug-in to work.  It only works when Calibre loads and processes the book file.
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06/2/2016 00:39:45

DRM Removal plugin works very fine for me.
About 100 times with ePubs from a open library, in Germany.

Good Job

Greeting
Tomato33

reply
06/24/2016 20:50:25
last method worked perfect
reply
07/17/2016 10:18:40

To those of you that are complaining about this plugin not working:

This website's offering an outdated version of the Calibre plugin. Try downloading the latest version from the plugin's official website first before you start complaining: apprenticealf(dot)wordpress(dot)com

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06/13/2017 12:59:42
Thank you so much. It's easy to install and work perfectly.
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06/15/2017 11:50:55
You are welcome!
reply
09/20/2017 04:21:27
Thank you very much, your plugin is working perfectly.
reply
09/20/2017 15:59:05
We are glad to know that it works well.
reply
12/20/2017 10:16:50
Perfeito. Pra quem não está conseguindo, baixe a versão antiga do Kindle para PC. Baixe o ebook através do Kindle para Pc. Dá super certo.
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01/9/2018 17:00:42
Works like a charm! Thank you very much..
reply
05/20/2018 21:54:44
It worked. Thanks.
reply
08/24/2018 10:05:04
Thanks for your feed back. Any suggestions don't forget to let us know.
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11/29/2018 02:30:58
superb job
reply
02/10/2019 10:29:13
Instruction: Run Calibre, and click "Preferences" in the top menu bar. Problem- Running Calibre brings up the Library where I cannot find "preferences". I must be doing something wrong, but what is it?
reply
02/20/2019 06:29:06
If you open up the main Calibre program screen, you will see the PREFERENCES all the way to the top right.
reply
04/20/2019 13:58:49

Hi,
When I try to install the plugin, I get an error message: calibre, version 3.40.1
ERROR: Unhandled exception: <b>InvalidPlugin</b>:The plugin in u'C:\\Users\\Owner\\Downloads\\DeDRM_plugin (1).zip' is invalid. It does not contain a top-level __init__.py file

calibre 3.40.1  embedded-python: True is64bit: False
Windows-10-10.0.17763-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '10', '10.0.17763')
Python 2.7.15+
Windows: ('10', '10.0.17763', 'SP0', u'Multiprocessor Free')
Interface language: None
Traceback (most recent call last):
  File "site-packages\calibre\gui2\preferences\plugins.py", line 317, in add_plugin
  File "site-packages\calibre\customize\ui.py", line 472, in add_plugin
  File "site-packages\calibre\customize\ui.py", line 61, in load_plugin
  File "site-packages\calibre\customize\zipplugin.py", line 193, in load
  File "site-packages\calibre\customize\zipplugin.py", line 291, in _locate_code
InvalidPlugin: The plugin in ...\\DeDRM_plugin (1).zip' is invalid. It does not contain a top-level __init__.py file

Perhaps it needs an update?
Thank you!

reply
06/6/2019 14:36:05

This is the exact same problem that I'm having. When I open the .zip file, I can see the _init_.py file in the DeDRM_tools_6.6.3 in temp folder where the .zip unpacks.

Thinking I'll just get the other software and be done. This used to work perfectly, but sadly it doesn't and the plugin won't install now.

reply
06/10/2019 16:23:24
Thank you for reporting this issue. The plugin has been updated. Please download and try it again.
reply
06/12/2019 13:49:08

Seems the plugins was not updated, I still got the same issue today.

Cindy

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06/12/2019 21:44:48
Yep, same issue. Using Calibre 3.44
reply
06/14/2019 09:11:42
This problem has been fixed. Please redownload the plugin to dedrm your books.
Sorry again for the inconvenience caused.
reply
06/14/2019 09:10:47
Thank you for reporting this issue. We have updated the plugin again. Sorry again for the inconvienience caused.
reply
11/12/2020 12:32:22
I just updated to the latest calibre and downloaded the plugin today.I'm having the same issue. mac mojave.
reply
11/12/2020 14:15:29
Thank you for your comments. That's because the calibre is written by python 3 but the calibre drm removal plugin is written by python 2. You can follow this guide:  https://www.epubor.com/solutions-to-calibre-dedrm-plugin-not-working.html to get your this issue fixed.
reply
06/30/2019 06:42:57
I have been trying over 4 hours but not luck with converting KFX-ZIP file to epub. I have reinstalled KFX plugin but no luck
reply
09/23/2019 20:11:54

I did the following steps but Calibre still shows the message that books are DRMed.

1) Downloaded Calibre
2) Downloaded the Plug-In --> added it to the PREFERENCES. It sais it is active
3) Restarted Calibre.
3) Downloaded the E-Book in AZW3 from Amazon ("Download and transfer via USB")
4) Added the book to Calibre
--> Cannot open it in Calibre

Do you have some helpful ideas I maybe missed to do? Would be great if you could help!

reply
09/24/2019 08:44:59
If you have downloaded the kindle books from amazon via usb, this book is encrypted with azw3 drm. Please follow this part" Remove DRM from Kindle device with Calibre" in this article. You should enter the kindle series no.
reply
01/9/2020 10:39:28

Plugin does not seem to work again.  Please assist. Many thanks.


calibre, version 4.8.0
ERROR: Unhandled exception: <b>InvalidPlugin</b>:The plugin in u'/Users/apple/Desktop/DeDRM_plugin/alfcrypto_src.zip' is invalid. It does not contain a top-level __init__.py file

calibre 4.8  embedded-python: True is64bit: True
Darwin-18.7.0-x86_64-i386-64bit Darwin ('64bit', '')
('Darwin', '18.7.0', 'Darwin Kernel Version 18.7.0: Tue Aug 20 16:57:14 PDT 2019; root:xnu-4903.271.2~2/RELEASE_X86_64')
Python 2.7.16
OSX: ('10.14.6', ('', '', ''), 'x86_64')
Interface language: None
Traceback (most recent call last):
  File "site-packages/calibre/gui2/preferences/plugins.py", line 319, in add_plugin
  File "site-packages/calibre/customize/ui.py", line 472, in add_plugin
  File "site-packages/calibre/customize/ui.py", line 61, in load_plugin
  File "site-packages/calibre/customize/zipplugin.py", line 194, in load
  File "site-packages/calibre/customize/zipplugin.py", line 292, in _locate_code
InvalidPlugin: The plugin in u'/Users/apple/Desktop/DeDRM_plugin/alfcrypto_src.zip' is invalid. It does not contain a top-level __init__.py file

reply
01/9/2020 11:21:28
Thank you for asking. This is a free software and you can ask this question on its official website.
You can try our software epubor ultimate to remove ebook drm: https://www.epubor.com/ultimate.html
reply
01/24/2020 20:01:50

Doesnt seem to work.  i get this error message:  

DeDRM_plugin/alfcrypto_src.zip' is invalid. It does not contain a top-level __init__.py file

Im running mac 10.12
Calibre 3.48
Trying to convert Kindle to Kobo

reply
01/26/2020 14:16:12
What's your kindle for mac version? Please ensure you are using kindle for mac older than 1.23 to download kindle books.Then try to use Calibre to remove kindle drm again. If you are still failed, please use Epubor Ultimate to remove kindle drm >>https://www.epubor.com/ultimate.html
reply
04/29/2020 09:24:55
Hi. it doesn't work. Any alternative? Thanks.
reply
04/30/2020 08:43:05

If you are looking for the alternative to Calibre DRM Removal plugin, please try Epubor Ultimate>> https://www.epubor.com/ultimate.html
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05/24/2020 17:48:49

The current 6.7.0 release at https://github.com/apprenticeharper/DeDRM_tools/releases/tag/v6.7.0 is not compatible with Python 3, while at least Calibre from Ubuntu 20.04 repositories already runs on Python 3.

There is ongoing community work on fixing this, and as a work-around the plugin can be cloned from a GitHub branch and installed manually. On Linux, this can be done on the command line like this:

[code]
git clone -b Python3 git@github.com:lalmeras/DeDRM_tools.git
cd DeDRM_tools
calibre-customize -b .
[/code]

reply
05/25/2020 11:21:32
Thank you for sharing this. We appreciate it.
reply
10/24/2020 22:36:41
I cant download the DRM removal plugin. the link you have given is not valid. please help. thank you!
reply
10/26/2020 08:54:54

Thank you for contacting us and we've check all the links in this page but they are all works fine now.
If you ensure there is invalid link, please send the link to us via epubor.iris@gmail.com.

Have a nice day.

reply
01/15/2021 05:29:09

I downloaded the Calibre plugin, unzipped and added the other zip file but it says 'InvalidPlugin... does not contain a top-level_init_-py file'
The other links I downloaded -the converters only convert a small percentage of the book and require you to pay $25 to convert. Is there another way??  

reply
01/25/2021 23:39:37
The DRM plugin is 32 bit, I get errors that say 32 bit running on 64 bit windows.
No Init support found. Is there a Windows 10 64 bit supported version?
reply
03/12/2021 00:34:02

I keep getting a syntax error when I try to load into Calibre.

I got it on my old file from 2019, and on the newly downloaded one just now.  See below:

calibre, version 5.12.0
ERROR: Unhandled exception: <b>SyntaxError</b>:invalid syntax (calibre_plugins.dedrm.__init__, line 167)

calibre 5.12  embedded-python: True is64bit: False
Windows-10-10.0.18362 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '10', '10.0.18362')
Python 3.8.5
Windows: ('10', '10.0.18362', '', 'Multiprocessor Free')
Interface language: None
Traceback (most recent call last):
  File "calibre\gui2\preferences\plugins.py", line 316, in add_plugin
  File "calibre\customize\ui.py", line 472, in add_plugin
  File "calibre\customize\ui.py", line 61, in load_plugin
  File "calibre\customize\zipplugin.py", line 293, in load
  File "importlib\__init__.py", line 127, in import_module
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "calibre\customize\zipplugin.py", line 185, in exec_module
  File "calibre\customize\zipplugin.py", line 181, in get_code
  File "calibre_plugins.dedrm.__init__", line 167
    print u" v: Copying needed library files from plugin's zip".format(PLUGIN_NAME, PLUGIN_VERSION)
          ^
SyntaxError: invalid syntax


reply
03/12/2021 01:22:09
And, I did try the other software, which left half the books as txt files and incomplete :(
reply
03/12/2021 08:53:29
Thank you for your feedback. Are you using the trial version? Please note the trial only convert 20% content of each book and store them as TEXT format.
If you want the whole content, please upgrade it to the full version now.
reply
03/16/2021 12:37:46

Syntax Error: invalid syntax line 167)

What's the fix?

reply
03/17/2021 10:44:22
Please follow this guide to get this issue fixed: https://www.epubor.com/solutions-to-calibre-dedrm-plugin-not-working.html
reply
07/7/2021 04:38:38
the links to the zip for this plug in don't work - nothing pops up to download. is this calibre plug in no longer free? can you point me in the direction of where to download this plug in? i have used this before but have a new computer and need to reinstall it here. thank you for your help!
reply
07/9/2021 09:18:54

The dedrm removal plugin is totally free. You can just download it from the link in this article. We've checked this link after your comment, and ensure it is working.

Have a nice day.

reply
08/9/2021 16:21:47
Perfect - many thanks:)
reply
09/12/2021 23:19:43

Does this work with the latest azw3 files? I downloaded some from Kindle Unlimted and I get message:

Cannot convert [book]. this book is locked by DRM.
thanks.

reply
09/13/2021 09:25:19
Which software does you mean here? Calibre or Epubor Ultimate?
We are sincerely sorry to inform you that both this software doesn't support the kindle unlimited ebook. The kindle unlimited ebooks are rented books.
reply
10/12/2021 17:34:20

Hi,
this doesn't seem to be working with the new version of Calibre (5.29.0). I get this error:

calibre, version 5.29.0
ERROR: Unhandled exception: <b>SyntaxError</b>:invalid syntax (calibre_plugins.dedrm.__init__, line 167)

calibre 5.29  embedded-python: True is64bit: True
macOS-10.16-x86_64-i386-64bit Darwin ('64bit', '')
('Darwin', '20.6.0', 'Darwin Kernel Version 20.6.0: Wed Jun 23 00:26:27 PDT 2021; root:xnu-7195.141.2~5/RELEASE_ARM64_T8101')
Python 3.8.5
OSX: ('10.16', ('', '', ''), 'x86_64')
Interface language: None
Traceback (most recent call last):
  File "calibre/gui2/preferences/plugins.py", line 327, in add_plugin
  File "calibre/customize/ui.py", line 477, in add_plugin
  File "calibre/customize/ui.py", line 65, in load_plugin
  File "calibre/customize/zipplugin.py", line 293, in load
  File "importlib/__init__.py", line 127, in import_module
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "calibre/customize/zipplugin.py", line 185, in exec_module
  File "calibre/customize/zipplugin.py", line 181, in get_code
  File "calibre_plugins.dedrm.__init__", line 167
    print u" v: Copying needed library files from plugin's zip".format(PLUGIN_NAME, PLUGIN_VERSION)
          ^
SyntaxError: invalid syntax


Hope you can fix it!
Best regards

reply
10/14/2021 09:15:38

Please follow this guide to get this issue fixed: https://www.epubor.com/solutions-to-calibre-dedrm-plugin-not-working.html

reply
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