How to Restore .MP21 Files from Backup on Windows, MacOS, Android, and iOS

Have files been deleted due to a user’s error or software error? Have you formatted a disk by accident and need to know how to recover the files? Read our .MP21 file recovery guide for Windows, MacOS, Android and IOS in 2025.

How to Restore .MP21 Files from Backup on Windows, MacOS, Android, and iOS
Data Recovery Tool

What is a .MP21 file?

Media file saved in the AXMEDIS content distribution format; may contain multiple types of media, such as images, video, and audio data; may also include metadata, and DRM copy-protection information.

What Are Common Causes of ".MP21" Files Lost or Failure?

There are several common causes of ".MP21" files lost or failure:

  1. Accidental deletion: Users may accidentally delete ".MP21" files while organizing or cleaning up their computer, leading to their loss.
  2. File system corruption: File system corruption can occur due to various reasons like improper system shutdown, hardware issues, or malware infection. This corruption can result in the loss or failure of ".MP21" files.
  3. Software or hardware issues: Errors or bugs in software applications or hardware components can lead to the loss or failure of ".MP21" files. This can happen during file transfer, conversion, or when using specific software that handles ".MP21" files.
  4. Virus or malware infection: Viruses or malware can infect and damage ".MP21" files, rendering them inaccessible or corrupt. This can occur when downloading files from untrusted sources or visiting malicious websites.
  5. Storage media failure: If the storage media where the ".MP21" files are located (such as hard drive, USB drive, or memory card) fails or becomes damaged, it can result in the loss or failure of the files.
  6. Improper file handling: Mishandling ".MP21" files, such as force closing applications while they are open, abruptly removing storage devices, or interrupting file operations, can lead to file corruption or loss.
  7. Software or system updates: Sometimes, software or system updates can cause compatibility issues with ".MP21" files, leading to their failure or loss.
  8. Human error: Human error, such as accidental formatting of storage media, unintentional overwriting of ".MP21" files, or improper file manipulation, can result in the loss or failure of the files.

It is important to regularly backup ".MP21" files and use reliable antivirus software to minimize the risk of data loss or failure.

How to recover lost ".MP21" files?

Sometimes while working with a computer, laptop or other stationary or mobile devices, you may encounter various bugs, freezes, hardware or software failures, even in spite of regular updates and junk cleaning. As a result, an important ".MP21" file may be deleted.

Go to view
🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

By no means should you think that the only way to recover a ".MP21" file is always to create it once more.

Use programs for recovering ".MP21" files if a file was lost after accidental or deliberate deleting, formatting the memory card or the internal storage, cleaning the storage device, after a virus attack or a system failure.

Programs to recover ".MP21" files

Looking for a way to get files back? In cases when files were deleted and they cannot be restored by using standard operating system tools, use Hetman Partition Recovery.

Partition Recovery™ 5.0
The tool recovers data from any devices, regardless of the cause of data loss.
Download

Follow the directions below:

  1. Download Hetman Partition Recovery, install and start the program.

  2. The program will automatically scan the computer and display all hard disks and removable drives connected to it, as well as physical and local disks.

    File Recovery Software

  3. Double-click on the disk from which you need to recover ".MP21" files, and select analysis type.

    Hetman Partition Recovery - Analysis Type

  4. When the scanning is over, you will be shown the files for recovery.

    Hetman Partition Recovery - Files that Can be Restored

  5. To find a file you need, use the program’s interface to open the folder it was deleted from, or go to the folder "Content-Aware Analysis" and select the required file type.

    Hetman Partition Recovery - Deep Scan

  6. Select the files you have been looking for and click "Recovery".

    File Recovery Software - Files List for Recovery

  7. Choose one of the methods for saving the files and recover them.

    Saving recovered files in Hetman Partition Recovery

How to open file with ".MP21" extension?

Looking for how to open a stereo aXMEDIS MPEG-21 Object image file file?

Programs that open ".MP21" files

Windows
HEX Editor HEX Editor

Additional Information

  • File type: AXMEDIS MPEG-21 Object

  • File extension: .MP21

  • Developer: AXMEDIS

  • Category: Video Files

  • Format: N/A

  • File types that use the extension .MP21:

    • AXMEDIS MPEG-21 Object

    • MPEG-21 Multimedia File

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Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 12:44 #
    Leave a comment if you have any questions about Recovering lost .MP21 files after deleting, cleaning or formatting!
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Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as xaker.ru, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.

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Questions and answers

  • What is the file format .MP21 and what does it typically contain?

    The file format .MP21, also known as MPEG-21, stands for Moving Picture Experts Group 21. It is a multimedia file format that is designed for the storage, delivery, and consumption of multimedia content.

    MPEG-21 is an international standard that aims to provide a framework for various multimedia applications and services, including digital rights management, content identification, content description, and more. It defines a set of specifications and tools to enable interoperability between different multimedia systems.

    Typically, .MP21 files contain a collection of multimedia resources such as audio, video, images, and text, along with metadata that describes and organizes these resources. It allows for the packaging of different media components into a single file, making it easier to manage and distribute multimedia content across different platforms and devices.

  • How can I determine the appropriate software to open a .MP21 file?

    To determine the appropriate software to open a .MP21 file, you can follow these steps:

    1. Identify the file extension: The .MP21 file extension indicates that it is a file encoded using the MPEG-21 Multimedia Framework.
    2. Research the file format: Look up the .MP21 file format to understand its purpose and the type of content it contains. In this case, the MPEG-21 Multimedia Framework is a standard for multimedia delivery and consumption, including various types of media files, metadata, and rights management.
    3. Check for specialized software: Since .MP21 files are not commonly used and require specific support, you may need specialized software that supports the MPEG-21 standard. Look for software specifically designed for handling MPEG-21 files.
    4. Consult official sources: Visit the official website of the MPEG Industry Forum or other reputable sources related to MPEG-21 to find information on recommended software or tools for opening .MP21 files. They may provide suggestions or references to compatible software.
    5. Contact the file source or creator: If the .MP21 file was sent to you by someone or obtained from a specific source, reach out to them and inquire about the software they used to create or intended for opening the file. They might be able to provide guidance or share the necessary software.
    6. Try different software: If you couldn't find any specific software for .MP21 files, you can attempt opening the file with different multimedia players or editors that support a wide range of formats. Examples include VLC Media Player, Windows Media Player, Adobe Premiere Pro, or Final Cut Pro. Although not guaranteed, these programs might have the capability to handle .MP21 files.

    Remember, it's always important to exercise caution when opening files from unknown or untrusted sources.

  • Are there any specific steps or tools required to successfully open and view the contents of a .MP21 file?

    To successfully open and view the contents of a .MP21 file, you need to follow these steps:

    1. Identify the file type: .MP21 files are typically associated with the MPEG-21 Multimedia Framework, which is a standard for multimedia presentation and distribution. Confirm that the file you have is indeed an MPEG-21 file.
    2. Use a compatible software: To open and view .MP21 files, you need software that supports the MPEG-21 standard. One such tool is the MPEG-21 DIDL (Digital Item Declaration Language) Player, which is designed specifically for opening and viewing MPEG-21 files.
    3. Download the MPEG-21 DIDL Player: Search for and download the MPEG-21 DIDL Player from a trusted source. Ensure that you download the version compatible with your operating system.
    4. Install the software: Once downloaded, run the installer and follow the on-screen instructions to install the MPEG-21 DIDL Player on your computer.
    5. Open the .MP21 file: After installation, launch the MPEG-21 DIDL Player. Then, either use the "Open" option in the software's menu or drag and drop the .MP21 file into the player's interface.
    6. View the contents: The MPEG-21 DIDL Player should now display the contents of the .MP21 file, allowing you to view multimedia presentations or other media contained within it.

    Note: It's important to ensure that you download the MPEG-21 DIDL Player from a trusted source to avoid any potential security risks. Additionally, be aware that the availability of specific tools or software may vary, so it's recommended to research and explore alternative options if needed.
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