How to run a JAR file in Windows 11/10 Since Java or JAR files can’t run on Windows on their own, you need to install the Java Framework or what is popularly called Java.

Verify Java is associated with JNLP files using the Java Control Panel window. Open it by clicking "Start," selecting "Control Panel," clicking "Programs" and clicking the "Java (32-bit)" option.

If you have the Java Runtime Environment installed, and the JAR file is executable, it should open with a double-click. Sometimes, you might see a pop-up to choose which app to run the file.

How to Configure Chrome to Open JNLP Files. Java Network Launching Protocol, or JNLP files, are used for launching Java programs and Web applets over the Internet or company intranet. While some ...