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Jadx

Checked
brownfinesecurity·vlatest·security·MIT

Jadx decompiles Android APKs into Java source code, aiding reverse engineering and understanding app logic for security analysis & debugging.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add brownfinesecurity/iothackbot --skill jadx -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

brownfinesecurity

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned brownfinesecurity/iothackbot at d443c408a9.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
d443c408a9
Manifest
skills/jadx/SKILL.md
Scanned
1 file, 575 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill enables AI agents to decompile Android APK files into readable Java source code using Jadx, a dex to Java decompiler. It converts DEX bytecode into Java code, facilitating security analysis, vulnerability discovery, and understanding of app internals. Unlike tools that produce smali code, Jadx generates standard Java code which is easier to read and analyze.

When to use it

  • Security Analysis: Identify potential vulnerabilities within Android applications.
  • Reverse Engineering: Understand the logic and control flow of an application's code.
  • Discovering Secrets: Locate hardcoded credentials, API keys, or URLs within the app.
  • Analyzing Implementations: Examine encryption and authentication methods used by the app.
  • Automated Analysis: Integrate decompilation into automated workflows, CI/CD pipelines (using the CLI).

Key capabilities

  • Converts DEX bytecode to Java source code.
  • Provides both a command-line interface (CLI) and a graphical user interface (GUI).
  • Supports multi-threaded decompilation for faster processing.
  • Offers deobfuscation options to improve code readability, including renaming obfuscated classes.
  • Allows skipping resources or source code during decompression for performance optimization.

Example prompts

  • "Decompile this APK file: app.apk and save the output to a directory named app-decompiled."
  • "Decompile app.apk with deobfuscation enabled, saving the output to app-decompiled."
  • "Can you analyze the decompiled code of app.apk for potential vulnerabilities?"

Tips & gotchas

  • Prerequisites: Jadx (and optionally jadx-gui) and a Java Runtime Environment (JRE) must be installed.
  • Disk Space: Decompiled output can be significantly larger than the original APK file (typically 3-10 times).
  • Deobfuscation is Recommended: For obfuscated apps, using the --deobf flag will greatly improve code readability.