Gruntpocalypse is a JVM bytecode obfuscator written in kotlin with 40+ features.
This project aims for stability and versatility. Some ideas are taken from other obfuscators.
Feel free to koin our Discord server for suggestions: https://discord.gg/ysB2fMfeYW
100% passed JVM Obfuscation Test
If you encounter any compatibility issues, please open a GitHub Issue or join the Discord to help us improve Grunt.
Controlflow requires ComputeMaxs disabled.
Ensure all project dependencies are included for stability and intensity.
If dependencies are unavailable, enable useComputeMaxs in Global settings as a last resort.
Address VerifyError by completing dependencies first.
Only enable computeMaxs and disable controlflow obfuscation when dependencies are mostly unresolvable.
Stability level: 1 = Unstable; 5 = Stable
| Category | Feature | Level | Description |
|---|---|---|---|
| Renamer | ClassRename | 5 | |
| FieldRename | 5 | ||
| MethodRename | 5 | ||
| LocalVarRename | 5 | ||
| ReflectionSupport | 3 | InterfaceOverlap, InvokeDynamic, FunctionalInterface | |
| Minecraft | MixinClassRename | 4 | |
| MixinFieldRename | 4 | ||
| *MixinMethodRename | - | ||
| Encrypt | ArithmeticEncrypt | 4 | |
| ConstPoolEncrypt | 5 | ||
| NumberEncrypt | 5 | ||
| StringEncrypt | 5 | ||
| Redirect | MethodScramble | 4 | |
| FieldScramble | 5 | ||
| StringEqualsRedirect | 5 | ||
| InvokeDynamic | 5 | ||
| Optimization | SourceDebugRemove | 5 | |
| EnumOptimization | 5 | ||
| DeadCodeRemove | 5 | ||
| KotlinOptimize | 5 | ||
| Shrinking | 4 | ||
| Miscellaneous | *AntiDebug | - | |
| Crasher | 5 | ||
| Watermark | 5 | ||
| NativeCandidate | 5 | ||
| ShuffleMembers | 5 | ||
| TrashClass | 5 | ||
| ClonedClass | 5 | ||
| SyntheticBridge | 5 | ||
| HWIDAuthentication | 5 | ||
| PostProcess | 5 | ||
| DeclareFields | 5 | Move field declarations into the init/clinit of classes. | |
| Plugins | *NoverifyHackery | - | Force noverify and hackery bytecodes. Reference |
| RemoteLoader | 4 | Remote authentication and constant class loading services. | |
| VersionPatcher | 2 | Downgrade class version (Java 6 to Java 5) for Windows 98. | |
| ControlFlow - General | RandomArithmeticExpr | 5 | (Seed) Hide seed operations to anti-simulation. |
| BogusConditionJump | 4 | (If, Goto) Generate fake jumps with random junk codes. | |
| MangledCompareJump | 4 | (If, Goto) Generate conditional jumps with junk codes. | |
| ReversedIfJump | 5 | (If, Goto) Random mutation to jump conditions. | |
| *ParallelBranch | - | (If, Goto) Generate junk parallel branches. | |
| TableSwitchJump | 4 | (Switch) Generate TableSwitch to replace direct jumps. | |
| TrappedSwitchCase | 4 | (Switch) Random trapped jumps or weird loops between switch cases. | |
| JunkCodeGenerator | 4 | (JunkCode) Generate junk calls. | |
| SwitchExtractor | 5 | (Switch) Replace switches with blocks. | |
| MutateJumps | 5 | (Switch) Generate TableSwitch for compare statements. | |
| ControlFlow - Miscellaneous | ConstantBuilder | 4 | (If, Switch) Use controlflow to build constants. |
| SwitchProtector | 4 | (Switch) Hide real keys of switches. |
This is a free and open source software, licensed under GPLv3.
The previous Grunt versions are licensed under the MIT license (1.5.8 and before).
