Chromium HSTS Preload List Python Package

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library 2025.1.1 ·python
verified May 23, 2026

The `hstspreload` Python package provides an offline, queryable version of the Chromium HSTS (HTTP Strict Transport Security) preload list. It allows users to check if a given hostname is included in this list, indicating that web browsers should only access it via HTTPS. The package's data is updated monthly by an automated script, ensuring a regularly refreshed snapshot of the official list.

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