Convert Exe To Py

Once you confirm the packer (we will assume PyInstaller, as it is the most popular), the extraction process has already begun using the command above.

Inside the extracted folder, look for files with the .pyc extension (Python Compiled files).

Troubleshooting Tip: If the main script file has no extension, simply rename it to your_program.pyc.

If the EXE contains truly compiled code (Cython/Nuitka), you might load it into Ghidra (free, from the NSA). You'll get assembly code, not Python, but a skilled reverse engineer can infer algorithms.

Decompiling software you do not own or have permission to analyze is illegal in most jurisdictions. This guide is intended only for: convert exe to py

Original script (hello.py):

name = input("What is your name? ")
print(f"Hello, name!")

After EXE → decompiled recovery:

# Decompiled with uncompyle6
name = input('What is your name? ')
print('Hello, {}!'.format(name))

Not identical, but functionally the same.

uncompyle6 extracted_folder/your_file > recovered.py Once you confirm the packer (we will assume

For Python 3.9+, use pycdc (Decompyle++):

git clone https://github.com/zrax/pycdc
cd pycdc && cmake . && make
./pycdc ../extracted_folder/your_file.pyc > recovered.py

| Original .py | Decompiled .py | |----------------|------------------| | Variable names: user_age | Variable names: var1, var2, local_42 | | Comments and docstrings | Missing entirely | | Clean indentation (4 spaces) | Messy indentation, redundant parentheses | | F-strings: f"Hello name" | Equivalent but ugly: "Hello " + name | | List comprehensions: [x*2 for x in data] | Expanded into a for loop |

Example:

You wrote:

def calculate_discount(price, is_member):
    """Apply 10% member discount"""
    return price * 0.9 if is_member else price

You might get:

def calculate_discount(price, is_member):
    if is_member:
        return price * 0.9
    else:
        return price

The logic works. The readability does not.

Once you have valid .pyc files with correct headers, use a decompiler:

| Tool | Best For | Command Example | |------|----------|------------------| | uncompyle6 | Older Python (3.8 and below) | uncompyle6 main.pyc > main.py | | decompyle3 | Python 3.7–3.8 | pycdc main.pyc | | pycdc (PyPy Decompiler) | Python 3.9+ and complex bytecode | pycdc main.pyc -o main.py | Troubleshooting Tip: If the main script file has

Example using uncompyle6:

pip install uncompyle6
uncompyle6 extracted/main.pyc > recovered_main.py

uncompyle6 -o ./output_dir ./extracted_file.pyc