Home : File Types : JAR File

.JAR File Extension

File TypeJava Archive File

DeveloperOracle
Popularity
4.2 (616 Votes)
CategoryExecutable Files
FormatZip

Zip

This file is saved in a zipped format. You can view the contents by unzipping it with a file decompression program.

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.

More Information

JAR files can contain .CLASS files, application resources, and an optional manifest file (META-INF/MANIFEST.MF). They are compressed using .ZIP compression and may optionally be digitally signed using the jarsigner tool included with the Java SDK. JAR files may be created with the jar tool, and they can be accessed using Java's java.util.jar API.

JAR files are used for some mobile games supported by Java-enabled mobile devices. They are also used by Mozilla Firefox, Thunderbird, SeaMonkey, and Sunbird to store themes and add-ons.

NOTE: The Java Runtime Environment is also referred to as the Java Virtual Machine (JVM). Sun Microsystems, the original developers of the JRE/JVM, were acquired by Oracle.

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Open and view .JAR files with File Viewer Plus.
Programs that open JAR files
Updated 8/18/2016

About JAR Files

Our goal is to help you understand what a file with a *.jar suffix is and how to open it.

The Java Archive file type, file format description, and Mac, Windows, Linux, and Android programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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