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Calibre DRM Removal Plugins

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Calibre's success majorly depends on those varieties of plugin in my personal point of view. No-doubt the 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.

Today I am going to cover this problem: How to install and use Calibre DRM Removal plugins.

1Install 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:

2Download the DRM Removal plugin

Download the DeDRM Plugin V6.08 here:

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

3Install 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 "Advanced" area.


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.


Finally you can see the success notification.


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


Now the plugin is installed successfully, you can use Calibre to handle DRMed eBooks.

4The easier way to decrypt eBook DRM

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

Windows Version Download Mac Version Download

With this program you need not to download or install Calibre and the plugin. Just download and install the All DRM Removal, you can decrypt all the books listed above.

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.

Here maybe you are interested in this video about All DRM Rmoval epubor.



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.

01/18/2014 06:54:01
Thank You!
07/13/2015 00:53:33
Well, this didn't work. I'm giving a half star. Seems that most people who try to give a low rating default to five stars. Let's see if I do.
07/14/2015 18:42:56
Can you tell me more details about your problem?
06/1/2014 14:14:11
I get an error from python when I try
06/2/2014 14:45:41
All DRM Removal plug is cripled (and lame).  No mention of $35 price tag until it's installed.  No more epubor for me.
06/3/2014 18:57:31
5 Star Rating was an error.  I would give a minus rating if it were allowed.
06/18/2014 11:40:26
Did not work at all on kindle books
06/25/2014 12:23:00
doesn't work. For me it was a waste of time.
06/29/2014 12:48:16
doesnt work
06/30/2014 11:34:03
I had the same problem, it didn't works, but the solution is easy, just remove completly Calibre from your PC, then connect your account with Adobe Digital Editions (if is not connected) then install again Calibre with all them pluggings and test it again.
I dont use Kindle, but i think is the same way to delete DRM to them.
07/10/2014 21:11:31
DRMed Calibre plug-in didn't work with calibre 1.43 running on Mac OS X
07/22/2014 15:58:14

I've run Calibre together with Alf's deDRM on a Macbook Air running Kindle for Mac for 2 years now quite reliably. I particularly like that Calibre converts anything to anything else when I lend a book to a friend that can't read whqtever the format is. One nuisance is that Kindle don't name the book file with the title. It's just random letters. So what I do is sort the Kindle purchases in order of time and the new purchases rise to the top to copy over to the designated input folder for Calibre. And Calibre is really good about duplicates anyway, so it's easy to keep.

One complication for me is highlighting. Although Kindle won't print or copy, it does highlight nicely. Calibre won't highlight though it does copy and print. Kovid says on his site that highlighting is a feature he won't add to Calibre. Adobe does highlight, but is unstable, I've lost portions and whole book underlinings. Sony reader is stable so I use Sony when I want to underline. How odd to have to carry a toolbox just to read.

08/14/2014 12:13:26
I spent 4 hours - user of Calibri for many years - updated to newest and could NOT get DeDRM Plug in to appear no matter how many times downloaded / exploded / loaded into Calibre per all instructions (PCs running WinVista or Win7).
I'll try other option now. Years ago on WinXP had a simple program called DRM Removal (or similar) - worked perfect and converted DRM books instantly. I'll look for that too.
Good Luck!
08/14/2014 19:43:47
If you cannot handle Calibre, you can just use this DRM Removal tool,
08/14/2014 12:16:36
Oops! That 5-star rating is a default - I forgot to change to "less than 1".
08/14/2014 20:08:11

Thanks Hyde for response. Sorry for confusion - I love Calibre and have used it many years. The DeDRM programs for PlugIns to Calibre did not work per instructions on this site. I can't find original comments right now.
I did find and download a program that worked perfect in 2 seconds on my Adobe Digital Ediion book (translated to MOBI for Kindle).
It's called epubdrmsetup - perfect!
Thanks again for your hint, and I know can't beat Calibre.

11/18/2014 20:26:12
did not work tried it several times to convert kindle book. says it installed but will not convert. help
11/18/2014 23:13:35
How about try Epubor Kindle DRM Removal?
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!

04/4/2015 13:13:22
My god! Thank you, you made my day!
07/15/2015 13:56:43
You are awesome!
12/17/2014 20:07:00
El proceso fue fácil y lo logre, pude quitar el DRM
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.
01/29/2015 22:15:04

Spent money on this, doesn't work.

These reviews are fake and created by the makers of this site. This is a scam! Avoid this at all costs.

Removing DRM doesn't work, I've been trying for the longest time using these lying programs. Customer support won't reply to me after I sent an email telling them this program is failing to function.

Please, avoid!

01/30/2015 03:06:52

Hi Micheal,

Sorry for the inconvenience.

But actually this is the first message we got from you.

Can you tell me more details about your problem? You can directly open a ticket to contact us:

Thank you.

02/2/2015 17:13:34
Does not work. Not even a little bit. Just in case you're thinking about trying this...
02/2/2015 19:01:14


If you failed with Calibre DRM Removal plugin, you can have a try with Epubor All DRM Removal.

03/12/2015 02:26:21

i have the QT4 message on MacOsx
To resolve the issue :
Download an old version of Calibre (1.40 for exemple)

Copy the app on the desktop (not on the application folder) run it and the extensions works for me


03/16/2015 03:45:25
The plugin DeDRM does not work and the
All DRM Removal has also not worked.
03/16/2015 19:35:27


Our All DRM Removal can definitely help you remove Kindle, Nook and Adobe DRM. Can you tell me where you purchased your books and the format of your books?

03/16/2015 03:57:49
sorry for my comment before.
I was in the wrong directory from the removed file.
It has worked correctly.
04/11/2015 10:41:53

Hi, I have Calibre 2.24 on W7, and this version does not have the option of installing a plug-in from a file, only from the master list.

I tried to do the "manual" installation from the "Writing your own plugins..." help, with the command line:

calibre-customize -b 1.

and it installed some stuff but came up with the error message:
[Error 3]  The system cannot find the path specified:  u'1.\\*.*'

Presumably this could work if I found the right directory to unzip the Obok files into.
Any help on this?

I find this most frustrating, as I bought a book on Kobo, believing it to be in epub format, which I could read on my various devices.  As it happens, I borrowed the original book from a library, my wife got partways through on her Nook, and I decided to buy it so she could read it leisurely.  Well, of course, I am unable to liberate it from the Kobo, and what is really additionally irritating, that I cannot find the place where she stopped.  I have copied out a sentence from the page where she was on in the Nook, but Kobo is unable to search for a phrase (in spite of suggesting a phrase search), and the Nook version was consecutively page numbered, while the Kobo version restarts the page numbering in each chapter.  Guess how many more books Kobo will be selling to me?



04/13/2015 19:00:09


I installed Calibre 2.24 and am able to install plugin from file.

However, for Kobo books, you can download .acsm file from Kobo website at first, then convert acsm to EPUB via Adobe Didital Editions, you can read this guide post:

04/28/2015 07:57:49
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!

05/4/2015 23:13:47
Does the Mac version work, anyone?
05/5/2015 22:59:53
Of course you can run it on Mac, if you have installed Calibre.
05/27/2015 23:16:58

This calibre tool works and doesn't work.  :)

I have it installed on this computer twice.

  WinXP here. Two different user accounts.  Each with Digital Editions, each with Calibre, each with the removal tool installed in calibre.

  One works.  The other one doesn't.  

  I have removed the book from calibre library and then reinstalled it again and it still doesn't work.

  So I know it works.  And I know it doesn't work.

I tried the removal tool thing but that turned out to be simply a trail that led towards an ask for money...

06/20/2015 23:24:53

I run calibre on a MacBook. I have tried to install the DeDRM Plugin, but I get the following fault:
calibre, version 2.31.0
FEHLER: Nicht abgefangener Fehler: <b>InvalidPlugin</b>:The plugin in u'/Users/corinnabroser/Downloads/DeDRM_plugin/' is invalid. It does not contain a top-level file


06/24/2015 18:52:57
I have almost 6,800 ebooks that I store and read in Calibre, and I have had Calibre for years. The problem I ever had with it was when I was stupid enough to not make sure I keep the updates current or when I didn't read the instructions correctly. Only a illiterate could have a problem with Calibre. Follow the instructions, and it works well. With Calibre Companion I can get all or some of my books on my Samsung Phone, or it will format the books perfectly to send to my Kindle Reader. Formatting works automatically when it is copied. I rest my case - Calibre is the best, and I choose to ignore anyone who can't use it as computer illiterate. Here's my advice RTFI "Read the F***ing Instructions.
06/29/2015 02:23:40
Works fine (win 7 + calibre 2.31[64bit])
07/18/2015 07:55:25


I didn't see all these poor reviews until AFTER I had installed the plug-ins.  Either I just now downloaded .azw3 files from Amazon that were already DRM free, which I doubt, or these Calibre plug-ins work seamlessly.  They work automatically during the Calibre import process... not during conversion.  So if you have already imported the books needing to deDRM, you must remove them from your Calibre library and reimport them now that the plug-ins are installed.

07/18/2015 07:55:26
For decrypting books from Kindle device:
1, Connect Kindle to computer with USB cable.
2, Directly drag the books from rightside column into leftside main window.

For decrypting books from Kindle for PC/Mac:
1, Download and authorize Kindle for PC/Mac with your Amazon ID.
2, Launch Kindle for PC/Mac, sync all books to your computer and make sure you can read all the books.
3, Run Epubor software, all done.

Detailed info:

08/11/2015 13:25:56

calibre, version 2.27.0
FEHLER: Nicht abgefangener Fehler: <b>ImportError</b>:Importing PyQt4 is not allowed as calibre uses PyQt5

calibre 2.27  isfrozen: False is64bit: True
Linux-4.1.3-201.fc22.x86_64-x86_64-with-fedora-22-Twenty_Two Linux ('64bit', 'ELF')
('Linux', '4.1.3-201.fc22.x86_64', '#1 SMP Wed Jul 29 19:50:22 UTC 2015')
Python 2.7.10
Linux: ('Fedora', '22', 'Twenty Two')
Successfully initialized third party plugins: DeDRM
Traceback (most recent call last):
  File "/usr/lib64/calibre/calibre/gui2/preferences/", line 291, in customize_plugin
  File "/usr/lib64/calibre/calibre/gui2/preferences/", line 369, in modify_plugin
    if plugin.do_user_config(self.gui):
  File "/usr/lib64/calibre/calibre/customize/", line 154, in do_user_config
    config_widget = self.config_widget()
  File "calibre_plugins.dedrm.__init__", line 494, in config_widget
  File "/usr/lib64/calibre/calibre/customize/", line 178, in load_module
    exec compiled in mod.__dict__
  File "calibre_plugins.dedrm.config", line 12, in <module>
  File "/usr/lib64/calibre/calibre/", line 36, in load_module
    raise ImportError('Importing PyQt4 is not allowed as calibre uses PyQt5')
ImportError: Importing PyQt4 is not allowed as calibre uses PyQt5

08/18/2015 06:46:41
Gracias tras intentarlo con varios con tus plugins y tus indicaciones lo he conseguido.
09/16/2015 02:09:33
Works fine :-)
10/2/2015 08:38:23
I did read the instructions but I get a Python error: no module named PyQt4.Qt (on Win 7, calibre 2.40)
10/7/2015 23:39:00


When did you get this error? Remove DRM or install plugins?

If you need to remove DRM, maybe you can try to use our software to decrypt DRMed books.


10/15/2015 04:43:46
Good Job. works fine for drm solved epubs.
11/3/2015 23:00:30
Doesn't work. Windows 7, 64bit.  Calibre works perfectly.  Plugin does not work at all.  It appears that the entire premise of this site/tutorial is to provide people with a solution we know not to work in order for 'force' people to use the epubor program instead (which is not free, by they way).  Disgusted at the apparent scammyness of this system.
11/19/2015 13:55:19
Waste of time.
This book is locked by DRM
11/19/2015 19:08:28


Have you installed plugin successfully? If you have added books into Calibre, after installing plugin, you'd better delete the added books, then reload it to Calibre.

If it still fails to remove DRM, you can try our All DRM Removal to remove DRM.

11/24/2015 05:45:41
Excelente!! Thanks.
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