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Java bytecode editor
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JByteMod is a multifunctional bytecode editor with syntax highlighting and live decompiling and method graphing. The successor of JByteMod:

Screenshot 1 Screenshot 2 Screenshot 3 Screenshot 4 Screenshot 5

JByteMod was originally based on JBytedit (Written in Kotlin) by QMatt. I decided to recode it after QMatt deleted his account because it wasn't very stable and had almost no features.


Argument Description
--help Displays help
--file File to open (.jar / .class)
--dir Working directory
--config Config file name


  • Apache Commons IO
  • Objectweb ASM
  • RSyntaxTextArea
  • SkidSuite
  • Procyon Decompiler
  • Fernflower Decompiler
  • JGraphX
  • JFreeGraph


To create a plugin you have to extend me.grax.jbytemod.Plugin and export it as a .jar file.


To install a plugin you have to place the .jar file in a folder named "plugins" (that's in the same directory as JByteMod)

Example Plugin

How to build

mvn clean
mvn package
java -jar target/JByteMod-1.5.1.jar
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