How to Decode a JAR File (View & Decompile Contents)

Learn how to decode a JAR file — a JAR isn't encrypted, just zipped and compiled. View its contents and decompile classes to Java source online, no install.

What "Decode" Actually Means for a JAR

Step 1: Decode the Container (View the Files)

Step 2: Decode the Classes (Decompile to Java)

Command-Line Alternative

Why Does the Decompiled Code Look Odd?

Summary