Grunteon

Grunteon is the third generation of Grunt. A high concurrency JVM bytecode obfuscator framework written in kotlin.

This project is under development starting from November 2025.

Feel free to join our Discord server for suggestions: https://discord.gg/ysB2fMfeYW

QQ-chat group: 554702632

Features

Working in progress. The following is a list of features that have been completed or are currently being developed in the near future

Framework

• Parallel pipeline
• Filter system
• Compose based UI
• SSA-IR / Flow-IR
• Native cpp codegen

Controlflow flattening

• Verifier
• Dispatcher protect
• Bogus jump/loop
• Shuffle blocks
• Dispatcher trailing block
• Anti-static simulation
• Shared terminator
• Junk code

Controlflow jump

• Verifier
• Bogus jump
• Mangled jump
• Reversed jump
• Dispatcher landing block
• Anti-static simulation
• Runtime dynamic predicate
• Shared terminator
• Junk code

Controlflow exception

• Verifier
• Exception bridge

Encrypt

• Number encryption
• String encryption
• Arithmetic substitution
• ConstPool extractor

Miscellaneous

• Declared fields extractor
• Parameter obfuscation
• Trash class generator
• HardwareID authenticator
• Anti debug

Optimize

• Class shrinking
• Dead code remove
• Enum optimize
• Kotlin class shrinking
• Method inliner
• Source debug info hide
• String equals optimize

Other

• Decompiler crasher
• Fake synthetic bridge
• Reference obfuscate
• Shuffle members
• Watermark

Redirect

• Field access proxy
• Invoke proxy
• Invoke dispatcher

Rename

• Class renamer
• Field renamer
• Method renamer
• LocalVar renamer
• Mixin renamer

License

Grunteon is a free and open source obfuscator framework licensed under Apache License 2.0

Yapyap is a grunt extension pack licensed under PolyForm Strict License 1.0.0

The license of each Grunt version：

Stargazers over time