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 | Class renaming |
| FieldRename | 5 | Field renaming | |
| MethodRename | 5 | Method renaming. Support InterfaceOverlap, InvokeDynamic, FunctionalInterface | |
| LocalVarRename | 5 | Local variable renaming | |
| ReflectionSupport | 3 | Reflection remapping after renaming | |
| Minecraft | MixinClassRename | 4 | Class renaming for Mixin class |
| MixinFieldRename | 4 | Field renaming for Mixin class | |
| *MixinMethodRename | - | Method renaming for Mixin class | |
| Encrypt | ArithmeticEncrypt | 4 | Replace arithmetic operation to its substitution |
| ConstPoolEncrypt | 5 | Encrypt constants in class constant pool | |
| NumberEncrypt | 5 | Encrypt numbers in different ways | |
| StringEncrypt | 5 | Encrypt strings in different ways | |
| Redirect | MethodScramble | 4 | Generate method call proxy |
| FieldScramble | 5 | Generate field call proxy | |
| StringEqualsRedirect | 5 | Replace string eqauls | |
| InvokeDynamic | 5 | Encrypt method call via invoke dynamic | |
| Optimization | SourceDebugRemove | 5 | Remove source debug information |
| EnumOptimization | 5 | Optimize enum classes | |
| DeadCodeRemove | 5 | Remove redundant dead codes | |
| KotlinOptimize | 5 | Kotlin intrinsincs/metadata optimizer | |
| Shrinking | 4 | Code shrinking | |
| Miscellaneous | *AntiDebug | - | Insert anti debug checker |
| Crasher | 5 | Crash the decompiler | |
| Watermark | 5 | Insert watermark | |
| NativeCandidate | 5 | Automatically append annotation for candidates | |
| ShuffleMembers | 5 | Shuffle members in class | |
| TrashClass | 5 | Generate trash classes | |
| ClonedClass | 5 | Clone trash classes | |
| SyntheticBridge | 5 | Insert synthetic and bridge flag to hide code | |
| HWIDAuthentication | 5 | Insert HardwareID authenticator | |
| PostProcess | 5 | Remapping related files in jar | |
| 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).
