jclasslib Bytecode Viewer — Inspect Class Files (Online Alternative)

jclasslib shows the internal structure of a .class file — constant pool, methods, and bytecode. Here's what it does and how to inspect bytecode in your browser.

What jclasslib Shows

Viewer vs Decompiler — Which Do You Want?

Option 1: Inspect Bytecode Online (No Install)

Option 2: jclasslib Desktop / IntelliJ Plugin

Option 3: The `javap` Command (Built Into the JDK)

Summary