PyArmor
Obfuscate Python scripts to protect intellectual property and restrict usage.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is PyArmor?
PyArmor is a tool used to obfuscate Python scripts, allowing developers to bind obfuscated scripts to specific machines or set expiration dates. This helps in protecting the intellectual property of software and controlling its distribution.
Key differentiator
“PyArmor stands out as a robust, open-source solution for Python script protection, offering both machine binding and expiration features without requiring cloud services or additional fees.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
Obfuscation can be reversed by experienced attackers, providing only a moderate level of security.
The process of decrypting and executing the script at runtime can introduce significant performance penalties.
Configuring PyArmor to bind scripts to specific machines or set expiration dates requires detailed understanding and careful configuration, which can be error-prone.
PyArmor may not work seamlessly with all third-party libraries or virtual environments, leading to potential compatibility issues.
Fit analysis
Who is it for?
✓ Best for
Developers needing to protect their Python code from reverse engineering and unauthorized use.
Companies that want to control the distribution and usage of their software through machine binding or expiration dates.
✕ Not a fit for
Projects where complete transparency of source code is required.
Scenarios where the overhead of obfuscation and licensing checks would significantly impact performance.
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Alternatives
Next step
Get Started with PyArmor
Step-by-step setup guide with code examples and common gotchas.