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Basic information about M21 file

When there is a problem with opening files with the file extension M21（*.M21 or *.m21）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the M21 file yourself.

There are 2 file types using the M21 file extension in our database. In the further part of this page, you will find detail information about all the M21 file with their brief description and a list of programs that support M21 file sorted by operating systems. The table below provides useful information about the M21 file extension. It answers questions such as:
  • What is the M21 file?
  • How to open a M21 file?
  • What programs do I need to open a M21 file?
  • What programs help to create and edit a M21 file?
  • How to convert M21 files to another file format?
  • How to convert another files to M21 file format?


1.Detail information about M21 file extension: AXMEDIS MPEG-21 File

File type AXMEDIS MPEG-21 File Category Video Files
Developer AXMEDIS File format N/A
Description M21 file is a AXMEDIS MPEG-21 File developed by AXMEDIS. Media file created with the AXMEDIS Editor; saved in a packaged content distribution format and may contain multiple types of media; may also include descriptive metadata, and DRM copy-protection information.
Software programs that will open, edit or convert M21 files

Windows		 AXMEDIS Editor
AXMEDIS Player


2.Detail information about M21 file extension: MPEG-21 File

File type MPEG-21 File Category Video Files
Developer N/A File format N/A
Description M21 file is a MPEG-21 File.
Software programs that will open, edit or convert M21 files

Windows		 Apple QuickTime Player

macOS
 Apple QuickTime Player



Can't open a M21 file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.M21”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the M21 extension without any issue.


Where I can download the application that support M21 file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of M21 files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a M21 file?

The reasons for the lack of the ability to open a M21 file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a M21 file. If there is still something wrong, you might want to check:

  • Whether the M21 file is damaged.
  • Whether the M21 file is incorrectly linked in the registry entries.
  • Whether the M21 file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the M21 file format is incompletely.
  • Whether the M21 file is infected.
  • Whether the drivers of the equipment used for opening a M21 file are up to date.
  • Whether your computer has enough hardware resources to open a M21 file.

If the M21 file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.