Col-E/Recaf
Recaf
Recaf is a suite of specialized tools for assembling, editing, deobfuscating, decompiling, and instrumenting Java bytecode and runtime processes. It provides a coordinated environment for modifying compiled Java class files and analyzing the behavior of Java applications.
The project distinguishes itself through a multi-level abstraction layer that allows for editing across different formats and a pluggable framework that routes bytecode through multiple configurable decompilation engines. It includes an embedded scripting engine and plugin architecture to automate repetitive tasks and extend system behavior.
The toolset covers several high-level capability areas, including static analysis for searching application content and simulating method execution states. It also supports runtime instrumentation for attaching to live processes and automated bytecode transformation for removing obfuscation and repairing class files.
Headless execution is supported via a command line interface to integrate workflows into external build pipelines.
Features
- Bytecode Editors - Provides a coordinated environment for modifying compiled Java class files at multiple levels of abstraction.
- Java Decompiler GUIs - Provides a comprehensive graphical interface for decompiling Java bytecode into readable source code using multiple engines.
- Bytecode Decompilers - Provides a pluggable framework that routes bytecode through multiple interchangeable decompilers.
- Runtime Process Attachers - Enables attaching to live Java processes to modify or analyze code during execution.
- Unpacking and Deobfuscation - Provides automated bytecode transformers to remove obfuscation and repair malicious class files.
- Java Bytecode Analysis Tools - A specialized tool for modifying and analyzing compiled Java class files across multiple abstraction levels.
- Java Bytecode Editing Tools - Enables modifying compiled Java application code while automatically maintaining program structure.
- Bytecode Assemblers - Includes a bytecode assembler for writing and injecting raw instructions using simplified syntax.
- Runtime Bytecode Instrumentation - Supports modifying the bytecode of classes already loaded in a running JVM process.
- Java Bytecode Deobfuscators - Removes obfuscation from compiled Java applications using automated bytecode transformers and renaming.
- Runtime Language Instrumentation - Attaches to live processes to analyze method states and modify code during execution.
- Bytecode Transformers - Provides automated bytecode transformers to rename members and patch class files for deobfuscation.
- Bytecode Recompilation - Implements bytecode recompilation to convert modified source code back into binary format.
- Scripting and Automation - Allows extending system behavior and automating repetitive tasks via a scriptable plugin architecture.
- Bytecode Content Search - Provides capabilities to find strings, numeric constants, and instruction patterns throughout the compiled program.
- Command Line Interfaces - Provides a command line interface for headless execution and integration into build pipelines.
- Operand Stack Simulation - Allows inspection of local variable values and the operand stack at any specific point during a method's execution.
- Virtual Machine State Simulators - Tracks operand stack and local variable values at specific instruction offsets to simulate method execution.
- Logic Deobfuscation - Includes automated bytecode transformers to remove obfuscation and restore original program logic.
- Bytecode Modification Pipelines - Uses CLI and custom scripts to automate repetitive Java bytecode modifications in integration pipelines.
- Scriptable Plugin Architectures - Exposes internal system functions to an embedded scripting engine for custom automation and extensions.
- Multi-Level Representation Mappings - Maps high-level source code and bytecode to a shared internal representation for seamless cross-format editing.
- Game Hacking Tools - Java bytecode editor for modifying binaries without recompilation.
- Decompilers - Listed in the “Decompilers” section of the Awesome J2me awesome list.
Star history
How this analysis was created: This summary and feature list are AI-generated from collected project material and can contain mistakes. Stars, license and language are imported from GitHub. Inclusion does not mean that we have tested or audited this project. Check the source documentation for any feature you depend on. Learn more on our About page.
