# Jadx — Android and Java Decompiler with GUI and CLI

> Jadx converts Android DEX and APK files back into readable Java source code with a built-in decompiler, search, and navigation interface.

## Install

Save as a script file and run:

# Jadx — Android and Java Decompiler with GUI and CLI

## Quick Use
```bash
# Install via Homebrew
brew install jadx

# Decompile an APK
jadx -d output_dir app.apk

# Launch the GUI
jadx-gui app.apk
```

## Introduction
Jadx is an open-source tool that decompiles Android DEX bytecode and APK files into human-readable Java source code. It provides both a command-line interface and a Swing-based GUI with code navigation, search, and syntax highlighting, making it a go-to for Android security research and app analysis.

## What Jadx Does
- Decompiles DEX, APK, AAR, AAB, and class files to Java source
- Provides a searchable GUI with syntax highlighting and cross-references
- Supports deobfuscation with mapping files (ProGuard, R8)
- Exports decompiled projects as Gradle-ready source trees
- Handles Kotlin metadata for improved output readability

## Architecture Overview
Jadx operates in two phases: first it parses Dalvik bytecode into an intermediate representation using its own IR, then it applies a series of optimization and deobfuscation passes before emitting Java source. The GUI is built on Swing with a custom code viewer that provides click-through navigation between classes, methods, and fields.

## Self-Hosting & Configuration
- Download release JARs from GitHub or install via Homebrew/Scoop
- Requires Java 11+ runtime to execute
- CLI flags control output directory, thread count, and deobfuscation
- Mapping files can be supplied with `--deobf-cfg-file` for readable names
- Plugin system allows custom decompilation passes

## Key Features
- Full APK-to-source decompilation in a single command
- Interactive GUI with code search, usage tracking, and text highlighting
- Resource decoding for AndroidManifest.xml, layouts, and assets
- Multi-threaded decompilation for faster processing on large apps
- Active development with regular releases and broad format support

## Comparison with Similar Tools
- **APKTool** — focuses on resource decoding and APK rebuilding rather than source recovery
- **JADX vs JD-GUI** — Jadx handles DEX natively while JD-GUI targets JVM class files
- **Procyon** — Java-only decompiler without Android-specific handling
- **CFR** — strong Java decompiler but lacks Android resource support
- **Bytecode Viewer** — wraps multiple decompilers but Jadx offers a cleaner standalone experience

## FAQ
**Q: Can Jadx decompile obfuscated APKs?**
A: Yes. Jadx applies its own deobfuscation heuristics and accepts ProGuard/R8 mapping files for name recovery.

**Q: Does Jadx support Kotlin?**
A: Jadx reads Kotlin metadata annotations and uses them to improve output, though the result is still Java source code.

**Q: Can I recompile the output?**
A: Jadx's Gradle export produces a project structure you can open in Android Studio, but full recompilation depends on completeness of the decompiled code.

**Q: Is Jadx suitable for large apps?**
A: Yes. Multi-threaded mode and incremental loading in the GUI handle apps with thousands of classes efficiently.

## Sources
- https://github.com/skylot/jadx
- https://github.com/skylot/jadx/wiki

---
Source: https://tokrepo.com/en/workflows/asset-1ffed113
Author: Script Depot