Converting an executable ( ) file back into Python source code ( ) is a process known as decompilation
. This is typically possible if the executable was originally created from Python using "freezing" tools like PyInstaller How to Convert EXE to PY
is a compiled binary, you cannot simply rename the file. You must extract the original bytecode and then decompile it: Extract the Archive
: Most Python executables are essentially compressed archives. You can use a tool like PyInstxtractor (PyInstaller Extractor) to unpack the file. This will give you the compiled Python bytecode ( Decompile the Bytecode : Once you have the convert exe to py
files, you need to turn them back into readable Python text. Tools like uncompyle6 decompyle3 are designed to translate this bytecode back into source code. Python in Plain English Key Considerations Legal & Ethical Limits
: Only decompile software that you own or have explicit permission to reverse-engineer. Code Quality
: Decompiled code often loses original comments and sometimes variable names, making it harder to read than the original script. Obfuscation Converting an executable ( ) file back into
: If the original developer used an "obfuscator," the resulting code may be nearly impossible to understand even after successful decompilation. Are you trying to recover your own lost source code , or are you looking to reverse-engineer a specific tool?
pyinstxtractor (For PyInstaller EXEs)Most Python EXEs are made with PyInstaller. This tool extracts the compiled bytecode.
| Scenario | Tool | Success Rate | Output Quality | |----------|------|--------------|----------------| | PyInstaller + Python 3.7–3.8 | Uncompyle6 | 80% | Poor (no comments, bad var names) | | PyInstaller + Python 3.9–3.11 | Pycdc | 90% | Moderate | | cx_Freeze / py2exe | Manual extraction + Pycdc | 70% | Poor | | PyArmor obfuscated | None | <5% | Gibberish | | Cython compiled | Ghidra (to C/asm) | 30% | Not Python | Method 1: Using pyinstxtractor (For PyInstaller EXEs) Most
PyInstaller is the most common tool for packaging Python scripts into EXEs. The pyinstxtractor.py script can unpack a PyInstaller-generated EXE.
How it works:
.pyc files (compiled Python bytecode).Usage:
python pyinstxtractor.py target.exe
After running, you get a folder containing .pyc files and other dependencies.