SSL & Web Headers100% In-BrowserHSTS Preload
HSTS Header Generator
Generate strict HTTP Strict Transport Security (HSTS) headers with max-age, includeSubDomains, and preload flags.
Real-time processing·No server uploads·Zero telemetry
hsts-header-generator
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How to Use HSTS Header Generator
01
Select max-age duration (recommended 1 or 2 years).
02
Toggle includeSubDomains and preload flags.
03
Copy header configuration for Nginx, Apache, or Caddy.
Privacy Guarantee
HSTS Header Generator runs 100% client-side in your web browser. Your data, passwords, keys, and files are processed using the Web Crypto API and never transmitted to any server. Zero telemetry, zero storage, zero cloud processing.
Frequently Asked Questions
What does the HSTS preload flag do?
It allows your domain to be hardcoded into Chrome and Firefox source code so browsers never attempt an insecure HTTP connection.
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