Having problems opening a jar file?

Find out what programs can help open, view, play or convert your jar files.

Opening jar files
Java Archive File

Did your computer fail to open a jar file? We explain what jar files are and recommend software that we know can open or convert your jar files.

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What is jar file?

Java Archive (JAR) file used by the Java Runtime Environment (JRE), a framework used for executing Java programs; can contain .CLASS files, application resources, and an optional manifest file (META-INF/MANIFEST.MF); may serve as a program library or as a standalone program that runs if the JRE is installed on the computer. Java Archive files 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 by Mozilla Firefox, Thunderbird, SeaMonkey, and Sunbird to store themes and add-ons. NOTE: Sun Microsystems, the original developers of the Java language, were acquired by Oracle. The Java Runtime Environment is also referred to as the Java Virtual Machine (JVM).

Software that will open, convert or fix jar files

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