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

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

Controlflow flattening

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

Controlflow jump

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

Controlflow exception

• [ ] Verifier
• [ ] Exception bridge

Encrypt

• [X] Number encryption
• [X] String encryption
• [X] Arithmetic substitution
• [ ] ConstPool extractor

Miscellaneous

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

Optimize

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

Other

• [X] Decompiler crasher
• [X] Fake synthetic bridge
• [X] Reference obfuscate
• [X] Shuffle members
• [X] Watermark

Redirect

• [X] Field access proxy
• [X] Invoke proxy
• [X] Invoke dispatcher

Rename

• [X] Class renamer
• [X] Field renamer
• [X] Method renamer
• [X] 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