Luau Decompiler

Work in progress, taking PRs.

Installation

The decompiler requires Node.js to run.

To install Node.js, visit the Node.js website.

To install the decompiler, clone the repository:

git clone https://github.com/cadenmarinozzi/Luau-Decompiler

Then navigate to the root directory and install the dependencies:

cd Luau-Decompiler
npm install

Usage

Usage: npm start <input-file> <output-directory>

The decompiler will output the decompiled Lua code to the output directory, along with the deserialized code.

Getting Luau Bytecode

To get the bytecode of a Luau file, you must build the generator binary.

You may also use bytecode from other sources, as long as it is valid Luau bytecode and compatible with the version of Luau that the decompiler is built for.

To build the generator, run the following commands in the generator directory:

First, download the Luau source code from the Roblox repository:

git clone https://https://github.com/luau-lang/luau

Then build the Luau compiler:

On all platforms:

mkdir cmake && cd cmake
cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo
cmake --build . --target Luau.Repl.CLI --config RelWithDebInfo

On Linux/MacOS:

make config=release luau

Then build the generator:

On all platforms:

cmake -B build -S .

On Linux/MacOS:

make

Usage:

./generator <input-file> <output-file>

Example:

./generator file.luau bytecode.luauc

The output file will contain the bytecode of the input file.