.JAR File Extension

File Type:
Java Archive File

Having trouble opening .jar extension? Don't panic! This page explains what jar files are as well as suggests programs you may use to open jar files. You can download these programs through this page.

What is a JAR file?

Jar file extension has Java Archive file type, developed by Oracle, which is associated with the "executable files" category.

Typically applied by the Java Runtime Environment (JRE), the Java archive file may be used either as a program library, or as a standalone program, which runs upon installing the JRE on user’s mobile device or computer. JAR files use .ZIP compression; they may save application resources, .CLASS files, etc.

JAR files are often applied for mobile games that are supported by Java-enabled mobile devices. Additionally, such files are commonly used by Sunbird, Mozilla Firefox, Thunderbird, etc., for saving various add-ons and themes.

To learn how you can open the given file, read the information below.

jar file icon
File Type:
Java Archive File
Executable Files

How to open JAR file?

Double click the jar file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .jar extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the jar extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the jar file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open JAR files

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the jar file as well. Download Universal File Viewer for your OS.

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