How to Open a JAR File on Android

Android can't run a .jar by tapping it. How to look inside one on your phone for free with no app install, play old Java phone games, and use Minecraft mod JARs.

What Kind of JAR Do You Have?

Option 1: Look Inside Online (No App Install)

Option 2: Open It in a File Manager App

Option 3: Play an Old Java Phone Game

Option 4: Minecraft Mod JARs

Can I Convert a JAR to an APK?

Summary