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Epubor ACSM Mate User Guide

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Thanks for your support of Epubor ACSM Mate.

Epubor ACSM Mate allows you to convert ACSM files downloaded from online bookstores and public libraries into regular EPUB or PDF files.

Note: Please choose the right version for you to install ACSM Mate. This guide demonstrates how to install and use Epubor ACSM Mate on Windows. But it is available on both Windows and MacOS.

Part 1: Download & Install

Step 1 Download the right and latest version
Download Epubor ACSM Mate for free:
   
Step 2 Install Epubor ACSM Mate

Download the right and latest version. Then double-click the file you downloaded ( .exe file for Windows users, .zip file for Mac users) to start the installation. We use Windows as an example in this tutorial, but as long as you install the right version, this software can work well with the same instructions regardless of the operating system.

epubor acsm mate install

Part 2: Free Trial & Register & Deregister & Uninstall

1. Free Trial

Launch Epubor ACSM Mate, the registration window will automatically pop up to let you input your license email and license code to register this software. If you want to continue using the trial version, just close the registration window.

Please note: The trial version can only allow you to download and convert up to 3 books for free.

If you want to unlock the full premium features, please make a purchase for the software.

Subscription ACSM Mate for Win ACSM Mate for Mac
1-year License $29.99-Buy Now $29.99-Buy Now
5-year license $49.99-Buy Now $49.99-Buy Now
Family License $99.99-Buy Now 99.99-Buy Now

2. Register

After you place an order for Epubor ACSM Mate, you will receive an order confirmation email with a license key within 24-48 hours. Then just run Epubor ACSM Mate and click the key icon on the upper right to enter the license email and license code for registration.

acsm mate registration window

3. Deregister

If you want to change your computer, you need to deregister Epubor ACSM Mate. Please click the gear icon in the right corner, then click "Help"—"License", and click "Deregister" button.

acsm mate deregister button

4. Uninstall

You can search for this software under Apps & Features and right-click to uninstall it.

uninstall acsm mate

Part 3: Epubor ACSM Mate Tutorial( Step-by-Step)

Step 1 Download ACSM files to your local computer

An ACSM file (Adobe Content Server Message) is not a real e-book. It is a small license or ticket file used to download books protected by Adobe DRM. Please download the ACSM file from the online stores or public libraries where you get the e-book to your local computer.

download acsm to local computer

Note: When you download the book, you will get an ACSM file called "URLLink.acsm" or a file that includes the book name with the extension .acsm.

Step 2 Authorize Epubor ACSM Mate with Bytebooks (ADE) Account

Launch Epubor ACSM Mate, then click the "Person" icon and select "Add to New Account" option.

acsm mate add new account

Next, type your ByteBooks account email address and the password into the field below to authorize Epubor ACSM Mate.

authorize acsm mate bytebooks account

Note: ADE now uses ByteBooks for sign-in. You must create a new free ByteBooks account using your previous Adobe ID email address to authorize ADE and access your existing digital library.

Step 3 Convert ACSM files with Epubor ACSM Mate

Click the "Add" button or drag and drop the ACSM files from your computer to Epubor ACSM Mate program.

add acsm to acsm mate

Just wait for a while, the program will automatically convert the ACSM files to regular EPUB/PDF files.

acsm mate convert successfully

Finally, you can click the "Open" button to open the output folder where converted books are saved. The ACSM files are stored as regular EPUB/PDF ebooks so you can read them on any device.

acsm mate output folder

Part 4: Troubleshooting and FAQ

If you fail to convert the ACSM files, please hover the mouse over the error to display the error message.

acsm error message show

Frequently Asked Questions
Q: Why do I fail to convert my ACSM files?

A: Typically, Epubor ACSM Mate supports a normal ACSM file that can be opened by ADE. You can open the ACSM file with ADE to check if there is a problem with the ACSM file itself.
Here's a breakdown of situations where conversion can fail:

1. E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER: You have already opened the ACSM file with another Bytebooks account (Adobe ID) in ADE.

acsm opened with another user
Solution: Please redownload the same book in ACSM format from the website where you get the book. If you borrowed this book from a public library, you can also return the book, then borrow it again and redownload it as ACSM file.
2. E_GOOGLE_DEVICE_LIMIT_REACHED: You have downloaded a Google Play ebook onto the maximum number of allowed devices.

ade device limit reached
Solution: This problem always appears on ebooks purchased from Google Play. You can delete the offline book from other phones, tablets, or computers where you opened it. Or contact the Google Play Support Team directly and ask them to manually reset the download/device counter for your problematic books.
3. License Server Communication Problem: E_ADEPT_INTERNAL: That error usually means Adobe Digital Editions (or your ebook reader) can’t properly reach or sync with the Adobe license server. This is an Internet connection problem, or it may be caused by the Adobe's server itself.

ade server issue
Solution: Firstly, please check the internet connection/firewall/VPN. If it is still not working, you need to contact Adobe Support for help.

Q: How can I switch to another Bytebooks account (Adobe ID)?

A: You can click the "Person" icon at the top-right-corner to add a new account or switch to another account.
acsm mate add switch account

Q: What can I do if I log in failed?

A: Please confirm again if you have entered the correct email address and password; don't include any space characters. You can also go to the Bytebooks website and check if you can successfully log into your account.
acsm mate login failed

author

Hello, my name is Nancy! I’ve been always a book enthusiast, and I love reading very much. As an editor for Epubor, I’m glad to share all my favorite books, audiobooks, and tips to read E-books all I know.

3 Comments
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Sharon
08/26/2026 17:23:25
ACSM Mate is so quick and simple. I will be purchasing a licence in the future.
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Epubor Iris
08/27/2026 09:52:44
Thank you for your feedback! We’re delighted to hear that you’re enjoying our software. We truly appreciate your support.
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Annie
10/9/2026 10:47:07
Unfortunately, this is useless to me as I have a tablet with an Android OS and a laptop with Linux.  When do you intend to make this program accessible to other users.  It looks so good, it is especially appealing to those who prefer not to be locked in to Microsoft and Apple: it's a real shame I can't use it.
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