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Chromium HSTS Preload list as a Python package

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Chromium HSTS Preload list as a Python package.

Install via python -m pip install hstspreload

See for more information regarding the list itself.


The package provides a single function: in_hsts_preload() which takes an IDNA-encoded host and returns either True or False regarding whether that host should be only accessed via HTTPS.


This package is built entirely by an automated script running once a month. If you need a release sooner of the package please reach out and I'll trigger a release manually.

This script gathers the HSTS Preload list by monitoring this file in the Chromium repository. Changes to the HSTS Preload list can be seen in the history of that file.



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