Convert ACSM to EPUB and Remove DRM

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We often download an .ACSM file after purchasing an eBook online, but it's not the eBook file. Here I will tell you how to convert ACSM to EPUB and PDF, then strip eBook DRM for reading on various devices.

To convert ACSM to EPUB you just need to follow these simple steps:

  1. Install Adobe Digital Editions (ADE)
  2. Authorize with your Adobe ID
  3. Open the .ACSM file via ADE
  4. ADE would save the .acsm to .epub (or .pdf)
  5. Use EPUB DRM Removal to remove DRM from the EPUB

Below is the step-by-step guide with detailed pictures.

How to Convert ACSM to EPUB books

Step 1 Download Adobe Digital Editions 4.5 (ADE).

Step 2 Register an Adobe Account and authorize your ADE Copy with your Adobe Account by clicking "Help"->"Authorize computer".

authorize Adobe ID

Have installed ADE before and wanted to switch an account?

please press "Ctrl + Shift + D" (Mac users press "Command + Shift + D") to wipe out the formal authorization information and re-authorize with the correct Adobe ID.

Step 3 Open .ACSM with authorized Digital Editions to download eBooks.

Double click the .ACSM file, then it will be opened with Adobe Digital Editions as default. And a window will be opened to show the downloading eBook (Network connection is needed).

open acsm epub

Tips: If your .ACSM file is not opened by ADE as default, right click the file and select "Open with" -> "Adobe Digital Editions 4.5 ".

convert ACSM to EPUB - open

Output EPUB path of ADE is generally as follows.

For Windows: ...\My Documents (Documents)\My Digital Editions ...

For Mac: Users/Your computer name/Digital Editions ...

You can also switch to "File" Menu -> "Item Info" -> "Location" to check the location of your downloaded EPUB book.

convert ACSM to EPUB - output path

After downloading the eBook, you can delete the .ACSM or back it up for downloading the eBook again.

We can read the converted EPUB eBooks on Adobe supported devices like Sony eReader, Kobo reader, Android Devices (with reading apps like BlueFire installed) etc. Just copy the converted EPUB files to the specified eBook folder of your device with the USB cable connected to your computer. Make sure your eReader is authorized with the same Adobe account, otherwise you will be prohibited to open the EPUB books.

However, you can't directly read the books on Apple Devices (iPad, iPod, iPhone with iBooks) and Amazon Kindle titles because they don't support Adobe DRMed books unless you can install compatible ADE app. So we have to remove DRM from the eBooks, then transfer them to anywhere as you like. Here is the best software for removing DRM from Adobe DRM protected ePUB.

How to remove DRM from ACSM (EPUB)

Step 1 Download Epubor Ultimate.


Step 2 Run this program. If your EPUB files are converted from ACSM as the guide above, the program will find your EPUB files automatically and display it in the left column. You can simply drag the file from left side to right side to remove DRM. You can also click "Add" button to import your books. Once you have successfully added EPUB file into this tool, DRM will be removed immediately.

remove DRM from EPUB file

You can right click on the added file and choose "Explore decrypted folder" or click "File"->"Open decrypted folder" to get your DRM free EPUB books. Hitting "settings" icon will lead you to change the source location and output folder.

Remove DRM from Kobo ACSM

If your ACSM files are downloaded from Kobo ebookstore, here is an easier way for you to remove drm: Kobo DRM Removal. It will automatically detect your ACSM files that you downloaded to computer or your Kobo eReaders (Eink). No need to use Adobe ID to authorize your files any more.how do you convert acsm to epub

More about ACSM file extension

The ACSM file type is primarily associated with 'Adobe Digital Editions' by Adobe. If your computer is asking you where to save the .ACSM file then your Adobe Digital Editions may not be installed correctly or not yet authorized. Often you can solve this issue by simply setting your computer to always use Adobe Digital Editions to open this type of file. (Right click an .ACSM file -> "Properties" -> "General" -> "Change" -> "Adobe Digital Editions 4.5" -> "OK")

convert ACSM to EPUB - always open with ADE


works for Epubor and writes articles for a collection of blogs such as ebookconverter.blogspot.com.

08/30/2012 20:47:23
I have read this information before with Adobe digital. Perhaps Adobe Digital is not installed corrctly.
I did not see a software to remove DRM.  You mentioned being the best software but did not give the name.
09/7/2012 23:34:35

Thanks for viewing our site!
The page has introduced the software, here is the link:


10/6/2017 08:34:59
Does Epubor only allow you to access a portion of a book when you use the free trial version? I tried it with a book that has 248 pages and only the first 50 pages converted.
08/22/2018 10:15:49
The trial version will help  you decrypt 20% content of each book.
08/22/2018 10:17:05
Epubor Ultimate is our high rated software. You are also welcome to try this software:https://www.epubor.com/ultimate.html
01/18/2016 19:15:43

Thanks for this guide. However, I tried getting an ID but never received an email confirmation from Adobe. So in the end I tried 'activate without an ID' and it worked fine. So maybe you don't need to bother?

I also didn't bother with DRM for the two books I converted. They seem to work fine.

Thanks again.


09/30/2012 12:08:38
Your instructions are easy to understand and I have followed them.  My problem is adding the ebooks to Calibre.  I cannot open them there and I also am unable to download from ADE to my Sony reader.  I am not computer literate so many things are not as simple as they seem.  I read that I should be able to download to my reader from ADE but I see nothing to tell me that I can.
10/14/2012 18:20:53

Hi Clemira,
We are very sorry for the late reply.
Calibre is not able to add your books because your books are DRM protected, Calibre is only able to handle those DRM-free eBooks.

Now have you get the .ePub files or still .acsm files?

05/10/2013 09:24:21
Thank you Miss Wang . . . . I really need this info thanks a lot.
05/10/2013 18:23:57

Hi, Anil

Glad it works.

Feel free to tell us for any further problem.


05/12/2013 22:49:45
It is very useful information.  It save me a lot of trouble.  Many thanks.
06/25/2013 15:19:21
Thx. Super intro. Helped a lot :D
06/25/2013 19:27:51

Hi, Zizzi

Thanks for your kind words. We are glad that our guide helps.


11/29/2013 19:41:56
Thank you!!
01/17/2020 11:19:24
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01/11/2014 11:16:52

"the program will find your EPUB files automatically."

I bought a Google E-book (acsm file) and opened it in ADE, but apparently the file hasn't turned into an EPUB file; instead, it appears as a .pdf file instead. I tried putting ".epub" at the end of the file name, but the program failed in removing the DRM.

How do I solve this???

01/23/2014 23:30:47

Hi Louise,

Yes sometimes the .acsm will give a PDF file.

Then you need to use our Adobe EPUB&PDF DRM Removal, it can handle both EPUB and PDF files.

11/13/2014 22:33:05
Thanks for your help. It worked like a charm.
01/21/2015 16:27:11

Adobe Digital Editions fails to download epub content from acsm, just says about some license error and server error with something about unknown filetype.

Authorization is ok, tried that to some sample book (acsm) from ade website.

this drm is frustrating, you can't read the book you just bought.. :/

01/21/2015 20:51:26


This problem happens when you are not connecting your Adobe account with the account of the online store where you bought this book.

I would recommend you contact the book store's customer service for this issue.

01/22/2015 04:25:54

So what's the proper way to connect adobe account to let's say mat google account? I may as well create new adope account cause just made one yesterday for this purpose only.

So if I start with clear desk, what should I do to make sure things will work?

01/22/2015 20:02:45
Different online retailer provides different ways, the best practice is to contact the online retailer's customer service for help.
01/23/2015 02:11:32

Did that, contacted to google, and thay said it is font which is causing problems and they are trying to solve problem. No timefrime tough. They also offered option to get refund from book.

This shows that drm is crap, if you cand download book with some font by using acsm file, but you could do it other way just fine. Sure there are lot more reasons why drm is crap, but...

01/27/2015 02:59:28

Thank you for the information and the provided links, I could finally read the book I purchased on my kindle.

Thanks for sharing!

02/15/2015 17:35:07
It was really helpful! Everything worked for me, and now the book I purchased is in my Calibre and in my Kindle... Thank you for your help!!!!
03/29/2015 05:57:13
I don't have a good command of English...
I have tried to open that acsm file, but it's always appearing a window saying: "Error! Check activation."
I've got either Adove Digital Edition and
What do I have to do?
03/31/2015 18:32:47
Use the latest version of Adobe Digital Editions, and authorize with your adobe ID, then click .acsm file do download EPUB books.
01/21/2020 19:44:09
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03/29/2015 06:03:18
I don't have a good command of English...
I have tried to open that acsm file, but it's always appearing a window saying: "Error! Check activation."
I've got either Adove Digital Edition and
What do I have to do?
04/16/2015 19:20:56
For decrypting Adept ePUB&PDF books:
1, Install Adobe Digital Editions (ADE) on your computer and authorize your computer with Adobe ID.
2, Click .acsm file to download ebook file, make sure you can read the EPUB/PDF books on ADE.
3, Run Epubor software and add the EPUB/PDF books from default ADE content folder to software's main window, and remove DRM.
Detailed info: http://www.epubor.com/faq.html?utm_medium=cms&utm_source=cms&utm_campaign=sms&utm_content=smsReply_20150401#e201
If problem occurs, please delete all the books and sync again.
06/6/2015 17:42:11
I view something truly special in this web site.
12/14/2015 12:03:41
it works great, thanks
01/8/2016 13:06:52
thank you!
02/4/2016 13:35:20
Hi ! Thanks for this tutorial!! I have a problem, i already download my ascm file, found the epub file after adobe but when i drag it to your drm removal software it say "does not support e-book format" . Why am i seeing this? Ps: I dont have any kinddle device nor any device to read ebooks. Do i must to have one of them to do this?
02/4/2016 18:51:33


Can you tell me which software you are using? EPUB DRM Removal?

02/4/2016 20:04:56
Hi! Thanks for fast replying, no, i was using kindle drm removal. I have already removed the drm with another soft but this guide was definitly needed to do achieve it. Thanks you so much! Cheers from argentina, Lucas
02/4/2016 20:08:17


Glad to hear that your problem has been solved.

The Kindle DRM Removal only supports Kindle formats, but you are trying to remove DRM from EPUB with it, so it says "Don't support the format"

Thank you !

04/3/2016 12:10:37
Thanks a lot! Very helpful
07/23/2016 15:19:56
I have a computer that is not compatible with ADE 4.5 and the older ADE versions are incompatible with my .acsm file. Is there any other way to convert the file so that it is readable?
08/4/2016 02:44:05

1. Ctrl + Shift + D, erase authorization.

2. Delete your files under "My Digital Editions".

3. Download the old version of ADE, log in with your Adobe ID(authorize).

4. Download your ACSM file again and drag it to the ADE.

09/18/2016 03:45:43
Thanks a bunch this worked perfectly! Ended up buying a book on Google Play and then was at a loss as to how to get it on to my Kindle! Your guide helped me a lot because I'd never seen a .acsm file before and had no idea what DRM locked books were! Quick question: this AllDRMRemoval software: I've clicked free trial for now, how long will this trial last?
04/25/2017 12:13:06
Thanks, but may I know how to download the Google ebooks to Adobe Digital Editions? The ADE said that Error in getting licence. Could you please help improve?thanks.
06/12/2017 16:02:20
Here I was using Adobe Digital Edition to download some ACSM books from Google Book Store, and it corrupted with error message as " E_GOOGLE_DEVICE_LIMIT_REACHED", so does it be pohabited by Google?
06/15/2017 11:44:17

1- Visit this link--Google help center

2- Click in CONTACT US (upper right corner)

3- Explain the problem

Then the Google will contact you about solving this problem.

01/19/2018 05:57:53

The DRM removal seemed to work just fine, but the de-DRM pdf I got has the following tezt

"Your ebook has decrypted.
The TXT file just save 20% of ebook content.
Please register the software, then get full content and the valid ebook

Only a fifth of the book is actually there. Is there any way to get around this?

01/24/2018 14:50:49
That's because you are using the trail version. If you want to get the whole content of the decrypted book, you need to purchase the license version.
05/3/2018 03:35:04

Thank you for this post. ABSOLUTELY as simple as that.

Thank you

06/8/2018 10:23:16
Thank you! It is powerful software and solves my problem smoothly.
06/8/2018 10:25:26
Thank you for your comments. Epubor team will do our best to make our software better. Any problems or suggestions don't forget to contact us.
08/22/2018 10:28:02
Great tutorial!
11/15/2018 16:36:36
Great article.
03/7/2019 14:23:24
It somewhat worked, what you trade for getting rid of the DRM, you get ugly xhtml text formatting or no formatting, and it only converted 1/3rd of the book, rather disappointing.
03/8/2019 11:51:46

You are using the trial version. It will decrypt and convert 20% content of each book.
Here is the solution:
Solution 1: Buy the full version.

Solution 2: Ask for customer support team to ask for temporary license.

Solution 3: Contact editor team to help translation the software or one article in exchange of a free license .

04/20/2019 01:57:10
I'Im just going round and round trying to convert an .ascm file to pdf.
It's not working so I mus reEd it in browser.
08/28/2019 17:26:07
Very useful. Great product.
08/29/2019 08:44:13
Thank you for your feedback. We are glad to know you like this software.
11/3/2019 15:05:46
A million thanks to you! now I can read in Calibre the epub books I bought in google play books. I followed your instruction to download ADE and it works like a magic! Thanks to you and God bless. :)
11/4/2019 11:22:44
We are glad to know this article can help you. Have a nice day.
11/14/2019 00:51:14
j ai télécharger ABode mais quand j'essaie de telecharger mes livres déja numérisés j ai un message d erreur
11/18/2019 15:41:13
Can you please describe your issue more clearly and send it to support@epubor.com? Do you mean you want to convert your scanned pdf to other format?
01/25/2020 03:06:46
No disclaimer that it only decrypts 20% unless you buy the full version. Thanks for wasting my fucking time.
01/26/2020 14:18:14

Thank you to use Epubor Ultimate. To unlock the full content, please use the licensed version>>https://www.epubor.com/ultimate.html

You can either purchase the licensed version or get it for free >>https://www.epubor.com/get-free-license.html

03/26/2020 21:08:06
Its just a paid version sotfware, better use calibre for free
03/27/2020 10:02:23
Thank you for your comments. Yes, Epubor software is the paid version but we offer the best service to our customer and help them with the technical support. Anyway, it is a little for you guys to use calibre because first you need to install the drm plugin, then if there is any problem, no one will help you fix it. Anyway, you are the boss!
04/2/2020 12:19:00
Following these instruction, the "decrypted" file was just a txt document. Is that due to a limitation of the trial version or does this not convert DRM protected epubs to pdf?
04/4/2020 13:06:20
Thank you for using the trial version of Epubor Ultimate.
That's because of the limitation of the Epubor Ultimate. The full license will enable you to the ebooks in its original format.
Purchase epubor ultimate here>>https://www.epubor.com/ultimate.html
06/28/2020 01:15:25

Hi: I have a fully licensed version of Epubor Ultimate v3.0.12.610. I'm trying to decrypt and convert a new book I just downloaded to Adobe Digital Editions. ADE has my login and account correctly set up and I've successfully converted previous ACSM files. With this book I get an error message: AdeptDRM failed!

To test, I again successfully converted a previous book from last week so it's only this book, Any suggestions you have would be appreciated.

Thanks. --George

06/28/2020 09:15:14
Thank you for using our software.  
Please delete this book and try to download it with ADE on your computer again. Then try to remove DRM with Epubor software again. If you are still failed,
Please send the answer to our support@epubor.com:
where did you purchased this book?
Can you read it on your computer with ADE?
Then we will try our best to help you fix it.
10/22/2020 17:37:34
It does the work. And I thought USD 30 is okay. However, a little expensive for just removing the DRM. USD 20 is a more 'normal' price for a removal tool. But then, and I'm getting really annoyed by these practices, it is only for a 1-year subscription. If you want a lifetime subscription, it costs USD 55. For a removal tool. Are you serious?
10/24/2020 09:13:09
Thank you for using our software and we are sorry to know that you are not satisfy with the price. There will be holiday sale soon. If you like, you can wait to buy at that time. Here I mean Black friday and christmas sales.
11/2/2020 08:43:57
I would buy this if it worked properly, but when I tried out the trial version, it converted the ePub books I'd downloaded via Adobe Digital Editions to plain text files. I need an ePub file without DRM. A plain text file is no good to me!
11/2/2020 10:34:24
Thank you for using our software. That's because you are using the trial version. If you use the full version, you will get the full content in its original formatting, not the text file. Please don't worry. We have 30 day money back guarantee. If you are not satisfied with our software, just request the refund before that.
Have a nice day.
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