What is HSTS Preloading?
It is a list built into browsers that tells them to use HTTPS for your domain before the first time a user even visits your site.
HSTS Generator — Enforce Permanent HTTPS Security
Generate HTTP Strict Transport Security (HSTS) headers • Configure secure-only connections and preload eligibility
Last updated: May 2026
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Generate perfectly formatted HSTS (HTTP Strict Transport Security) headers. Protect your users from protocol downgrade attacks and get your domain ready for the HSTS Preload list.
• Fact-Checked & Verified•Compliance: 2026 Standards•Last Updated: May 2026
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Why Use our HSTS Policy Generator?
Generate perfectly formatted HSTS (HTTP Strict Transport Security) headers. Protect your users from protocol downgrade attacks and get your domain ready for the HSTS Preload list.
How it works
Users select the security duration and subdomain policies; the tool then generates the header string and server-specific configuration code.
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Key Features of HSTS Policy Generator
Max-age calculation (up to 2 years)
IncludeSubDomains support
Preload directive integration
Nginx and Apache config snippets
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Common Questions About HSTS Policy Generator
Can HSTS break my site?
Yes, if you enable HSTS and then lose your SSL certificate, users will be unable to access your site until the max-age expires. Start with a short duration first.
Looking for more professional developer utilities?
Explore All WebToolkit Pro ToolsEditorial Standards & Processing Transparency
This utility is engineered and maintained under strict editorial and technical standards. All source calculations are audited against official formatting standards and RFC specifications to guarantee mathematical and logic accuracy.
Content Creation & Automation Transparency: To ensure our dynamic developer specifications and reference datasets remain fully comprehensive and updated against newly released RFC updates, this page compiles technical documentation using advanced programmatic retrieval tools. Every output data block, feature list, and system specification is subsequently audited, fact-checked, and verified by our systems engineers for absolute correctness and accuracy.
Security Guarantee: To guarantee absolute user privacy, this tool executes 100% client-side inside your web browser. None of your input strings, payloads, keys, or files are ever transmitted to a server or stored externally.
Built by Abu Sufyan • Also explore: Severance Calculator & TradeConvert
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