File Extension ACSM

  • Full name
    Adobe Content Server Message Format
  • Developer
    Adobe Systems
  • Popularity
Have you encountered a problem with a ACSM file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a ACSM file here. In the further part of this page we have added a list of programs that should open your ACSM file. It is enough you choose a proper application for your operating system, download and install it.


The file extension ACSM identifies so-called Adobe Content Server message files. The files are used by Adobe Digital Editon and are a kind of key file (key) for download and authorization.

Adobe Digital Edition is a program for managing and reading ebooks and other digital publications. If you buy an e-book or an empty one (for example, from the example page of Adobe Digital Edition), you just download a fairly small ACSM file.

This file can be opened with Adobe Digital Edition, whereupon the corresponding book is downloaded. When purchasing e-books, the ACSM file also checks which rights are available for the respective book (read / copy / print). Acsm files are a kind of DRM (digital rights management)

The books themselves are available in different formats, for example EPub or pdf. With ctrl + I (Windows) or Cmd + I (Mac) you can view the information of the currently open book, including the storage path. However, it should be noted that there are protected, protected pdf files do not display with the Adobe Reader.

Programs which can open a ACSM file

How to open a ACSM file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the ACSM file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a ACSM file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support ACSM files. At this point we are looking for disk space where the application was installed in and we can link it with a ACSM file. Since then, our operating system will use the selected program to support all ACSM files.

Other issues

Despite the described problem with ACSM there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the ACSM file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the ACSM file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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