JAR File Extension - Open .JAR files

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Common File Extensions

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.JAR File Extension

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File Type

Java Archive File

Popularity

Common

Category

Executable Files

File Description

Archive that contains multiple Java files and is compressed using .ZIP compression; stores Java classes and metadata and may be digitally signed; runs as a program if the Java Runtime Environment (JRE) is installed on the computer.

JAR files are used by Mozilla Firefox, Thunderbird, SeaMonkey, and Sunbird to store themes and add-ons.

Program(s) that open jar files

Mac OS

Java Runtime

Any Web browser

Windows

Java Runtime

WinZip 12 Pro

Any Web browser