Programming language: Python
License: GNU General Public License v3.0 or later
Latest version: v6.5.5

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PyArmor is a command line tool used to obfuscate python scripts, bind obfuscated scripts to fixed machine or expire obfuscated scripts. It protects Python scripts by the following ways:

  • Obfuscate code object to protect constants and literal strings.
  • Obfuscate co_code of each function (code object) in runtime.
  • Clear f_locals of frame as soon as code object completed execution.
  • Verify the license file of obfuscated scripts while running it.

Also refer to The Security of PyArmor

Support Platforms

  • Python 2.7 and Python3.0~Python3.10
  • Prebuilt Platform: win32, win_amd64, linux_i386, linux_x86_64, macosx_x86_64
  • Embedded Platform: Raspberry Pi, Banana Pi, Orange Pi, TS-4600 / TS-7600 and more

Refer to support platforms

Quick Start


pip install pyarmor

Obfuscate scripts

pyarmor obfuscate foo.py

Run obfuscated scripts

python dist/foo.py

Pack obfuscated scripts into one bundle

pip install pyinstaller
pyarmor pack foo.py

Obfuscate scripts with an expired license

pyarmor licenses --expired 2018-12-31 r001
pyarmor obfuscate --with-license licenses/r001/license.lic foo.py

There is also a web-ui package pyarmor-webui

pip install pyarmor-webui

Start webui, open web page in browser (snapshots)


More usage, refer to

License & Purchase

PyArmor is published as shareware, free trial version never expires, but there are some limitations:

  • The trial version could not obfuscate the big scripts
  • The trial version uses same public capsule other than private capsule
  • The trial version could not download the latest dynamic library of extra platforms
  • The super plus mode is not available in the trial version

For details, refer to PyArmor License.

[Change Logs](docs/change-logs.rst)

It describes the fixed issues, new features, incompatible issues in different versions.

It's recommended to read this carefully before upgrading pyarmor.

Report issues

If there is any question, first check these questions and solutions, it may help you solve the problem quickly.

If there is no solution, for technical issue, click here to report an issue according to the issue template, for business and security issue send email to [email protected].

*Note that all licence references and agreements mentioned in the pyarmor README section above are relevant to that project's source code only.