How to Launch .jar

1. Download and install the free program WinRAR. Right-click on the JAR file you want to launch to open it. Select 'Extract To,' and choose a folder in the browse window that appears. Click 'OK' to open the contents of the JAR file into that folder.

2. Download and install 7-ZIP. This is a free program that can open archive files like ZIP, 7Z and JAR. Double-click on your JAR file to activate 7-ZIP, and launch the JAR file. Click and drag the contents to a folder on your computer to decompress them.

3. Navigate to the website Open JAR File. This free site allows you to launch JAR files without installing any software on your computer. Click 'Choose File,' and select the JAR file you want, then click 'OK.' Click 'Decompress File' to launch and open the file. Click the link provided to download the contents.