Jawa - JVM ClassFile Library

Jawa is a pure-python library for examining and disassembling JVM (Java) class files.


This documentation is up to date as of Jul 26, 2016.

Getting Jawa

Jawa is now available on pypi. You can install the latest release with:

pip install jawa

Alternatively, you can install the latest work directly from github:

pip install git+https://github.com/TkTech/Jawa.git

Why Jawa?

Jawa is intended to be used very differently from most projects similar to it. Instead of trying to produce a human-readable disassembly or nearly-compilable Java, it’s intended for people that want to dive into or automate work on JVM bytecode. For example, Jawa has been used for:

  • The automatic verification of community-uploaded plugins
  • Analysis and analytics of public Android APKs (thousands at a time)
  • Automatic extraction of “private” API keys embedded in Android APKs.
  • Automated reverse engineering of the Minecraft server and client.

Unlike most projects of its kind (like Krakatau) Jawa is also very permissively licenced under the MIT licence. You’re free to use it in any type of project should it be commercial, closed source or open source.