.JAR File Recovery

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 .JAR file recovery guide for Windows, MacOS, Android and IOS in 2023.

JAR File Recovery

What is a .JAR file?

A JAR file is a Java archive (JAR) file used by the Java Runtime Environment (JRE), a framework used for executing Java programs. JAR files may serve as program libraries or as standalone programs that run if the JRE is installed on the computer or mobile device.

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

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

  1. Accidental deletion: Users may accidentally delete ".JAR" files while managing their files or cleaning up their system.
  2. File corruption: ".JAR" files can become corrupted due to various reasons such as improper downloads, incomplete transfers, or hardware/software issues.
  3. Virus or malware infections: Malicious software can infect ".JAR" files, leading to their loss or failure.
  4. Software conflicts: Incompatibility or conflicts with other software or applications on the system can cause ".JAR" files to fail or become inaccessible.
  5. Operating system errors: Errors or glitches in the operating system can result in the loss or failure of ".JAR" files.
  6. Hardware issues: Problems with the storage device, such as a hard drive failure or bad sectors, can lead to the loss or corruption of ".JAR" files.
  7. Improper file handling: Mishandling or improper usage of ".JAR" files, such as forceful termination of Java processes, can cause them to fail or become unusable.
  8. Software updates or upgrades: Sometimes, updating or upgrading software or applications can lead to compatibility issues with existing ".JAR" files, resulting in their failure.
  9. Power outages or system crashes: Unexpected power outages or system crashes during the execution or storage of ".JAR" files can cause them to be lost or damaged.
  10. Human error: Mistakes made by users, such as accidental formatting of storage devices or incorrect file manipulation, can result in the loss or failure of ".JAR" files.

How to recover lost ".JAR" 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 ".JAR" 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 ".JAR" file is always to create it once more.

Use programs for recovering ".JAR" 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 ".JAR" 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.

The tool recovers data from any devices, regardless of the cause of data loss.

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 ".JAR" 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 ".JAR" extension?

Looking for how to open a stereo java Archive File image file file?

Programs that open ".JAR" files

File Viewer Plus File Viewer Plus
Oracle Java Runtime Environment Oracle Java Runtime Environment
Corel WinZip 23 Corel WinZip 23
7-Zip 7-Zip
WinRAR 5 WinRAR 5
Any <a href=Web browser"> Any Web browser
Corel WinZip Mac 7 Corel WinZip Mac 7
Oracle Java Runtime Environment Oracle Java Runtime Environment
Any <a href=Web browser"> Any Web browser
Oracle Java Runtime Environment Oracle Java Runtime Environment
Any <a href=Web browser"> Any Web browser
File Viewer for Android File Viewer for Android

Additional Information

  • File type: Java Archive File

  • File extension: .JAR

  • Developer: Oracle

  • Category: Executable Files

  • Format: Zip

  • Mime-type: application/java-archive

  • HEX: 50 4B 03 04



We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 16:51 #
    Leave a comment if you have any questions about Recovering lost .JAR 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.


Questions and answers

  • What is a .JAR file and what is its purpose in software development?

    A .JAR (Java Archive) file is a file format used in Java programming language for packaging and distributing Java applications, libraries, or related resources. It is essentially a compressed file format that contains all the necessary components of a Java program, such as compiled bytecode, resources, and metadata.

    The purpose of a .JAR file in software development is to bundle all the required files and dependencies of a Java application into a single archive. This makes it easier to distribute and deploy the application, as it can be treated as a standalone executable unit. Additionally, .JAR files are platform-independent, meaning they can be run on any system with Java Runtime Environment (JRE) installed, providing portability and compatibility.

    Software developers use .JAR files to package their Java applications, libraries, or modules, making it convenient for others to use and distribute their software. It also helps in managing dependencies, as all the required libraries or resources can be included within the .JAR file, ensuring that the application runs as intended on different systems.

  • How do I open a .JAR file on different operating systems?

    To open a .JAR file on different operating systems, you can follow these steps:


    • Double-click on the .JAR file, and it should automatically open with Java if it is installed on your system.
    • If it doesn't open, right-click on the .JAR file, select "Open with," and choose Java from the list of available programs.


    • Double-click on the .JAR file, and it should automatically open with Java if it is installed on your system.
    • If it doesn't open, right-click on the .JAR file, select "Open With," and choose Java from the list of available applications.


    • Open your terminal.
    • Navigate to the directory where the .JAR file is located using the `cd` command.
    • Run the command `java -jar filename.jar`, replacing "filename.jar" with the name of your .JAR file.

    Note: Ensure that Java is installed on your system before attempting to open .JAR files.

  • Are there any specific tools or software required to open and execute the contents of a .JAR file?

    Yes, to open and execute the contents of a .JAR file, you need Java Runtime Environment (JRE) installed on your computer. The JRE includes the necessary tools to run Java applications, including .JAR files. Once you have JRE installed, you can simply double-click on the .JAR file to execute it. Additionally, if you want to extract the contents of the .JAR file, you can use any file compression software like 7-Zip or WinRAR.

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