File extension MP21
| File type | MPEG-21 Multimedia Format |
| Developer | N/A |
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How to open MP21 files
If you cannot open the MP21 file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports MP21 among those that are installed on your device.
A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the MP21 file can be found in the table. Now just download and install the appropriate application.
Program(s) that can open the .MP21 file
Windows
Mac OS
Possible problems with the MP21 format files
The inability to open and operate the MP21 file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the MPEG-21 Multimedia Format file. Below is a list of possible problems.
- Corruption of a MP21 file which is being opened
- Incorrect links to the MP21 file in registry entries.
- Accidental deletion of the description of the MP21 from the Windows registry
- Incomplete installation of an application that supports the MP21 format
- The MP21 file which is being opened is infected with an undesirable malware.
- The computer does not have enough hardware resources to cope with the opening of the MP21 file.
- Drivers of equipment used by the computer to open a MP21 file are out of date.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the MP21 file should operate with your programs without any problem. If the problem with the MP21 file has not been solved, it may be due to the fact that in this case there is also another rare problem with the MP21 file. In this case, the only you can do is to ask for assistance of a professional staff.
Similar extensions
| .aaf | Advanced Authoring Format Multimedia Format |
| .aec | DataCAD Drawing Format |
| .aep | Adobe After Effects Project Format |
| .aepx | Adobe After Effects XML Project Format |
| .aet | Adobe After Effects Template Format |
| .aetx | Adobe After Effects Format |
| .ajp | AJP Player Video Format |
| .ale | Avid Log File Format |
How to associate the file with an installed software?
If you want to associate a file with a new program (e.g. my-file.MP21) you have two ways to do it. The first and the easiest one is to right-click on the selected MP21 file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the MP21 file extension to the corresponding software in the Windows Registry.
Is there one way to open unknown files?
Many files contain only simple text data. It is possible that while opening unknown files (e.g. MP21) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.