How to Run a JAR File on Windows

Run a JAR on Windows by double-clicking or from cmd/PowerShell. Install Java, fix the 'Windows can't open this file' association with jarfix, and solve common errors.

Step 1: Check You Have Java

Step 2: Run the JAR From the Command Line

Step 3: Run by Double-Clicking

Step 4: Fix the Association With jarfix

Troubleshooting Common Errors

Inspect a JAR Before Running It

Summary