How to Extract a JAR File

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JAR (.jar) files are archive files that contain Java class and associated metadata and resources. They are built on the ZIP format. [1] They are typically executed within a Java environment, but they can also be opened using archive programs like WinZIP, WinRAR, and 7-Zip. This wikiHow teaches you how to extract a JAR file's contents.

Things You Should Know

  • Since JAR files work like ZIP files, you can use an archive program like WinRAR to extract them.
  • For Windows users, you can install Java SE to use the ‘jar’ extraction command in the Command Prompt.
  • If you’re a macOS user, you can also install and use Java SE. You’ll use the ‘jar’ command in the Terminal.
Method 1
Method 1 of 3:

Using an Archiving App

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  1. JAR files work just like ZIP files. You can use any archive program to extract them. On Windows, you can Install WinRAR 7-Zip, or WinZIP. Macs have their own built-in archive program called Archive Utility. [2]
  2. Use File Explorer (press Win + E to open File Explorer) or Finder on Mac to navigate to the JAR file you want to extract.
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  3. Doing so prompts a drop-down menu.
  4. It's in the drop-down menu. A pop-out menu will appear with programs you can use to open the file.
    • If you don't see this option, click the JAR file once, then right-click it again and select Open with .
  5. You can use any archive program you have available on your computer.
    • On Mac, click Archive Utility .
  6. "Extract files" gives you the option to select a destination to extract the file to. "Extract here" extracts the files to the same location the Jar file is located.
  7. If necessary, click one of the folders on the right side of the window to select it as the location to which you want to extract your JAR file (WinRAR). If you are using 7-Zip, click the icon with three dots in the upper-right corner and navigate to the folder you want to extract the files to. Then click Ok .
  8. It's at the bottom of the WinRAR window. Doing so will extract your JAR file to the selected folder.
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Method 2
Method 2 of 3:

Using Java on Windows

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  1. If you don't have Java SE (the Java Developer Kit) installed, you won't be able to use the "jar" extraction command, and your file will be impossible to extract with this method:
  2. Click the folder-shaped File Explorer app icon in the taskbar that's at the bottom of your computer's screen. [3]
  3. Find the JAR file that you want to unzip.
  4. Click a blank space in the address bar at the top of the File Explorer window to do so.
  5. This will save the path to your JAR file.
  6. Click the Windows logo in the bottom-left corner of the screen.
  7. This opens the Windows Command Prompt.
  8. To do this type in cd and press the space bar. Then press Ctrl+V to past the file's path. Then press "Enter"..
  9. This is the command to extract a JAR file. [4]
    • For example, to extract a JAR file called "minecraft", you would type in jar xf minecraft.jar .
  10. This executes the command and extracts the JAR file.
    • If you receive an error message that says "'jar' is not recognized as an external or internal command", you need to change the path environment variable to "C:\Program Files\Java\jdk[latest version]\bin" Make sure you replace "[latest version]" with the latest version of Java Development Kit you have installed.
  11. You should now see the JAR file's extracted contents here.
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Method 3
Method 3 of 3:

Using Java on a Mac

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  1. If you don't have Java SE (the Java Developer Kit) installed, you won't be able to use the "jar" extraction command, and your file will be impossible to extract with this method:
  2. Click the Finder app icon, which resembles a blue face, in your Mac's Dock.
  3. Go to the location of the JAR file that you want to extract.
  4. Click the JAR file once to do so.
  5. Use the following steps to copy the path of the JAR file:
    • Right-click the JAR file.
    • Hold OPTION and click Copy [jar file] as pathname .
  6. Click the magnifying glass-shaped Spotlight icon in the top-right corner of the screen to do so.
  7. Type "terminal" into the Spotlight text box, then double-click the Terminal icon when it appears. This will open a Terminal window.
  8. This is the command to extract a JAR file. Don't press enter just yet, there is still more you need to do. [5]
  9. This executes the command to extract the JAR file.
  10. You should now see the JAR file's extracted contents here.
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Community Q&A

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  • Question
    I receive an error that jar is not recognized as an internal or external command, operable program or batch file. What do I need to do?
    Community Answer
    You will need to make sure that the Java JDK is installed. Windows also requires for your environment variables to have a path set to the location of the jar executable. Check your Path Environment Variable under the Advanced System Settings in the Settings Window. Restart your computer when you make changes to your path.
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  • Question
    I got an error that said java.io.FileNotFoundException (The system cannot find the file specified). What's up?
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    Community Answer
    This means that you made an error typing the file path, and Java can't find the file. Check that you have typed the right file path.
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      Tips

      • Popular versions of Linux, such as Ubuntu, allow you to extract JAR files by using the right-click menu: right-click the JAR file you want to extract, click Extract Here , click Close when prompted, and open the folder that's named after your JAR file.
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      • If you're going to be running and extracting more than a few JAR files, installing Java is recommended.
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      Warnings

      • While changing the .jar extension to a .zip extension on a Mac may sometimes allow you to extract the JAR, this method is more likely to cause an error.
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      References

      1. ↑ https://docs.oracle.com/javase/8/docs/technotes/guides/jar/jarGuide.html
      2. ↑ https://support.apple.com/guide/mac-help/zip-and-unzip-files-and-folders-on-mac-mchlp2528/mac
      3. ↑ https://support.microsoft.com/en-us/windows/zip-and-unzip-files-f6dde0a7-0fec-8294-e1d3-703ed85e7ebc
      4. ↑ https://docs.oracle.com/javase/tutorial/deployment/jar/unpack.html
      5. ↑ https://docs.oracle.com/javase/tutorial/deployment/jar/unpack.html

      About This Article

      Article Summary X

      1. Make sure you have an archive program like WinRAR or 7-Zip installed.
      2. Navigate to the JAR file.
      3. Right-click the JAR file and select Open with .
      4. Click your choice archive program.
      5. Click Extract here or Extract file .
      6. Select a location to extract the file to (if needed).
      7. Click Ok ..

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