Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .jar

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .jar file?
  • Which program can create the .jar file?
  • Where can you find a description of the .jar format?
  • What can convert .jar files to a different format?
  • Which MIME-type is associated with the .jar extension?
Java Archive .jar file icon

Java Archive

The JavaTM Archive file format enables you to bundle multiple files into a single archive file. Typically a JAR file contains the class files and auxiliary resources associated with applets and applications.
Category: Archive files
Program name: java.exe
Mime-type: application/java-archive
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Java Source Code
JRun Server Application
Java Enterprise Archive
Java Manifest File
Java Application Descriptor
BlackBerry COD Archive
Java Serialized Object
Digital Signature
Java Web Archive

Other types of files may also use the .jar file extension. If you have helpful information about .jar extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

JpgfDraw Drawing ASCII
Midtown Madness 2 Game Data
E-Sword Harmony Resource
OpenSimulator Inventory Archive
Trainz Jet Archive
Java Application Descriptor
Just A Frequency Logger Backup Data
RuneScape Data
JUCE Audio Thumbnail Data

The .jar filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

har (1), yar (1), ajr (1), nar (1), kar (1), jwr (1), jr (1), jag (1), jad (1), iar (1), ar (1), uar (1), mar (1), jxr (1), jra (1)

Can't open a .jar file?

If you want to open a .jar file on your computer, you just need to have the appropriate program installed. If the .jar association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.jar

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android