Your Python code.
Private, by design.

Python scripts can be read by anyone who has them. PyVMProtect replaces your code with a private runtime that no existing tool can reverse.

Windows x64  ·  Python 3.11 · 3.12 · 3.13
See Why It Holds Join for Free

Python is not protected by default.

When you send someone a .py file, they can read your source code directly. When you use PyInstaller to make an .exe, your .py files are still inside, just zipped. Tools like PyInstxtractor unpack them in seconds. Even compiled .pyc files can be decompiled back to readable Python in under a minute using free tools.

The problem is where Python runs.

PyInstaller, PyArmor, and Nuitka all still run your logic through CPython, Python's standard interpreter. CPython is open and hookable. An attacker can pause execution at the right moment and dump your decrypted code straight from memory. As long as CPython is in the chain, there is no way to stop this.

PyVMProtect replaces CPython's interpreter. Your logic never touches Python's eval loop.
source.py: exposed
import hashlib, requests

SECRET_SALT = "f9a2b1-internal-2026"
VERIFY_URL  = "https://api.yourtool.com/v2/verify"

def validate_license(user_key: str, machine_id: str) -> bool:
    digest = hashlib.sha256(
        f"{user_key}:{machine_id}:{SECRET_SALT}".encode()
    ).hexdigest()
    
    r = requests.post(VERIFY_URL, json={"hash": digest}, timeout=5)
    return r.status_code == 200 and r.json().get("valid", False)
attack attempt: blocked
; attacker has your .pyd file, trying standard tools
Commands shown are standard reverse engineering tools. Results reflect actual behavior on PyVMProtect output.

PyInstaller packs your .pyc. We don't.

PyInstaller bundles your Python source files into an executable. Anyone with PyInstxtractor can unpack it and read your code in under 30 seconds. We never ship your .pyc. It gets replaced entirely.

PyArmor renames things. We replace the runtime.

PyArmor scrambles your variable names and wraps your bytecode. A tool called pyarmor-unpacker can reverse this in minutes by hooking Python's eval loop. Our bytecode never touches CPython's eval loop. It runs in our own VM.

Nuitka compiles to C. Strings still leak.

Nuitka translates Python to C and compiles it. Strings and logic are still recoverable via Ghidra or a simple strings dump. Our string constants are encrypted with per-build keys and only decrypted for the exact CPU cycles they are needed.

Every Layer. Explained.

Eight protection systems that activate in sequence. Each one alone is hard to bypass. Together they make reversal economically impossible.

def check_auth(token):
  valid = False
  if token == key:
    valid = True
def _b7a(_x9f2):
  _o2 = False
  if _x9f2 == _z1:
    _o2 = True

Code Scrambling

All human-readable identifiers are irreversibly destroyed and replaced with meaningless hashed representations before virtualization.

0x01: LOAD_FAST 'token'
0x04: JMP_ABSOLUTE 0x0C
0x02: LOAD_CONST 'key'
0x07: NOP_OBFUSCATE
0x03: COMPARE_OP '=='

Instruction Shuffling

Standard Python instructions are reordered and padded with junk operations, breaking pattern-matching analysis tools.

> Attaching x64dbg to process...
> PROCESS TERMINATED. Anti-debug triggered.

Debugger Blocker

Continuous memory integrity checks. If a debugger attaches or the binary is patched on disk, execution halts immediately.

Hardware Lock Coming Soon

Lock your compiled binary to a specific machine. Prevent license sharing and unauthorized distribution without writing custom check logic.

decrypting_key...
0x00 0x00 0x00 0x00

Zero-Trace Memory

Constants are never stored in plaintext. They decrypt into a secure region only for the cycles needed, then immediately zero-fill.

Build A
0x4F2A
0xC1B9
0x88A3
Build B
0x1D7E
0x5522
0xF30C
Same source file. Different binary every time.

Unique VM Signatures

Every binary compiled is architecturally distinct. Cracks for one build are entirely useless against the next release.

scanning source...
▶ hot path: process_data() → native C
▶ sensitive: check_license() → VM
compiling hybrid output...

Native-Speed Hot Paths

Compute-heavy functions are automatically promoted to native C before virtualization. Heavy loops run near bare-metal. Sensitive logic stays locked inside the VM.

The Decompiler Test.

Every Python protection method has a layer where an attacker can intercept. See exactly where each tool exposes your code.

PyInstaller / cx_Freeze
[.py source]
→
[.pyc compile]
→
[bundle into .exe]
↑ EXPOSED HERE: PyInstxtractor unpacks the bundle and extracts the .pyc files inside. Pylingual (or decompile3) reads them back to readable Python in seconds.
→
[run]
PyInstxtractor is free on GitHub. Pylingual runs in a browser, no install needed. Your .pyc is readable in under a minute.
PyArmor
[.py source]
→
[obfuscate names]
→
[wrap in runtime]
→
[run via CPython]
↑ EXPOSED HERE: PyArmor must decrypt your code before CPython can run it. Right before execution, the decrypted bytecode exists in memory. A debugger can pause here and dump it.
Attack requires: x64dbg or any C debugger. Hook PyEval_EvalFrameEx, pause before execution, dump memory. The decrypted .pyc is sitting there.
Nuitka
[.py source]
→
[transpile to C]
→
[compile to binary]
↑ EXPOSED HERE: Nuitka compiles Python to C, but your strings (API keys, secrets, URLs) are stored as plaintext char arrays in the binary. Run the strings command on any Nuitka binary and read them directly.
→
[run]
Run: strings your_app.exe | grep http. Your API endpoints are right there. Ghidra recovers the full logic. No special skill required.
PyVMProtect
[.py source]
→
[rewrite into private opcodes]
→
[compile VM + opcodes into .pyd / .exe]
→
[run, no CPython involved]
No .pyc file. No CPython eval loop. No readable strings. Unique opcodes every build. Reversing this requires months of custom tooling, and that work is useless the moment you rebuild.
To reverse this: first figure out the opcode mapping, which changes every build. Then write a disassembler for it. Then deal with the anti-debug that kills the process. This is not a practical attack.
REST API

Automate protection in your pipeline.

Submit files, poll build status, and download artifacts without touching the UI. One API key. Works with any CI/CD system.

curl -X POST /api/v1/job_submit.php \
  -H "Authorization: Bearer pvmp_..." \
  -F "file=@my_script.py"
View API Docs Create Free Account
Early Access ยท Now Open

Free for early testers.

No credit card. No commitment. Full access to all active protection layers while we're in beta. Pricing kicks in at launch.

Current scope: Targets Windows x64 only. Hardware Lock ships Q3 2026. async/generators/context managers not yet supported. Built .pyd files are not code-signed : Windows SmartScreen may warn on first run.

Create Free Account How it works
7 active protection layers Python 3.11, 3.12, 3.13 Unlimited builds during beta Compute loops excluded at native speed REST API for CI/CD integration