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jclasslib bytecode viewer


jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode. In addition, it contains a library that enables developers to read and write Java class files and bytecode.

Main window

IntelliJ IDEA plugin

There is a plugin for IntelliJ IDEA that can be installed via the plugin manager. The action in the "View menu" can be invoked when a Java, Groovy or Kotlin file is open in the editor.

IntelliJ IDEA action

The bytecode will be shown in the "jclasslib" tool window on the right hand side. Multiple class files can be open at the same time.

IntelliJ IDEA action


jclasslib bytecode viewer is released under the GPL, Version 2.0.


Installers can be downloaded from the releases section.