PyArmor vs Pyobfuscate: Which Python Protection Tool Should You Use?
PyArmor is a powerful commercial tool that obfuscates Python and adds licensing, expiration and hardware-locking — ideal when you sell software and need runtime DRM. Pyobfuscate is a free, browser-based obfuscator that transforms your source at the AST level and returns plain, standalone Python with no runtime dependency — ideal for fast, no-cost source protection. Choose Pyobfuscate for free, instant obfuscation; choose PyArmor when you need commercial license enforcement.
If you distribute Python, you eventually hit the same problem: Python ships as readable source, and even .pyc bytecode decompiles back to near-original code. Two of the most common answers are PyArmor and Pyobfuscate — but they solve the problem quite differently.
This comparison is deliberately honest. PyArmor and Pyobfuscate overlap on obfuscation, but they aim at different users. Here's exactly how they differ and which one fits your situation.
PyArmor vs Pyobfuscate at a glance
| PyArmor | Pyobfuscate | |
|---|---|---|
| Price | Paid (limited free tier) | Free |
| Install | pip install pyarmor (local) | None — runs in the browser |
| Approach | Bytecode/RFT obfuscation + runtime engine | AST-level source obfuscation |
| Output | Obfuscated files that need the PyArmor runtime | Plain, standalone .py — no runtime needed |
| Licensing / expiration / hardware lock | Yes (a core feature) | No |
| Best for | Commercial products needing DRM | Quick, free source protection |
What PyArmor does
PyArmor is a mature, commercial Python protection product. It obfuscates your scripts and wraps them with a runtime engine that enforces protection at execution time. Its standout feature isn't just obfuscation — it's licensing and DRM: you can bind code to a specific machine, set expiration dates, and issue license files to customers.
That power comes with trade-offs: it's a paid tool for serious use, the protected output depends on PyArmor's runtime, and there's a real learning curve around its modes and license workflow.
What Pyobfuscate does
**Pyobfuscate** is a free, online Python obfuscator. It works at the Abstract Syntax Tree (AST) level — renaming identifiers, encrypting string and integer literals, flattening control flow, and optionally injecting junk code — then returns valid, standalone Python that runs anywhere, with no external runtime to ship.
There's no install and no signup: paste your code, get a protected version back in the browser. For an even stronger, single-file encrypted build, the Obfuscator PRO (.pyd) mode goes further.
Protection strength
PyArmor's runtime engine and paid modes (such as RFT and BCC) generally offer stronger runtime protection and make code recovery harder — that's what you're paying for.
Pyobfuscate's AST obfuscation is genuinely effective at stopping casual reading, copying and quick reverse engineering, and its output has one advantage PyArmor's doesn't: it's plain Python with no runtime dependency, so there's nothing extra to break, bundle, or get flagged by antivirus.
Ease of use and cost
This is where Pyobfuscate clearly wins: it's free, instant, and browser-based — no pip install, no account, no build step, nothing to configure.
PyArmor requires installation, command-line usage, and a paid license for its full feature set. That's justified if you need DRM; it's overkill if you just want to hand someone an obfuscated script.
Licensing & DRM — the real dividing line
The honest deciding factor is licensing. If you sell a Python product and need to enforce trials, expirations, or per-machine licenses, PyArmor is built for that and Pyobfuscate is not.
If you simply want to protect the source of a script you're distributing — a bot, a CLI tool, freelance deliverables — without cost or a runtime dependency, Pyobfuscate is the faster, simpler, free choice.
Verdict: which should you choose?
Choose Pyobfuscate if you want free, instant, no-install source protection and clean standalone output — perfect for most scripts, bots, and client work. Try it now.
Choose PyArmor if you're shipping a commercial product and need license enforcement, expiration, or hardware binding, and you're comfortable with a paid, local toolchain.
They're not really rivals so much as different tiers: start free with Pyobfuscate, and move to PyArmor when licensing/DRM becomes a hard requirement.
Protect your Python code for free
Obfuscate your source in the browser — no install, no signup, standalone output.
Open the Python ObfuscatorFrequently asked questions
Is Pyobfuscate a free alternative to PyArmor?
Yes — for the obfuscation part. Pyobfuscate is a free, browser-based Python obfuscator that protects your source with no install or signup. It does not replace PyArmor's licensing/DRM features, but for pure source protection it's a genuine free alternative.
Does Pyobfuscate require a runtime like PyArmor?
No. Pyobfuscate returns standalone, valid Python that runs anywhere with a normal interpreter. PyArmor's protected output depends on its bundled runtime engine.
Which is harder to reverse engineer?
PyArmor's paid runtime modes generally provide stronger runtime protection. Pyobfuscate's AST obfuscation strongly deters casual reading and copying and produces dependency-free output. For most distribution scenarios both raise the bar well above plain or .pyc code.
Can I use Pyobfuscate for commercial software?
Yes, you can obfuscate commercial code for free. If you also need to enforce licenses, trials, or hardware locking, pair it with a DRM tool like PyArmor or a licensing service.