Run or open a JAR file? Sometimes when a person uses the term “open a JAR file” they really mean they want to run a JAR file. To run a JAR file you must first install Java on your computer. With Java ...

Steps to run a JAR file on Windows, Mac or Linux To run a JAR file on Windows, Mac or Ubuntu machines, follow these steps: Verify that Java is installed on your computer Confirm the computer’s PATH ...

QUICK ANSWER To open and extract JAR files, you can use any file extraction software. This includes the built-in option on Windows or third-party apps like WinRAR or 7-Zip.