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Security Header Generator

Generate HTTP security headers, review recommended values, and prepare header snippets for websites and web apps.

Header Options

Generated Security Headers

Generated HTTP security headers will appear here.
Test security headers carefully before production. Some policies can block scripts, styles, frames, images, fonts, or third-party services.

Generating HTTP Security Headers for Safer Websites

HTTP security headers help browsers handle pages more safely. They can reduce MIME sniffing, unwanted framing, weak referrer sharing, risky permissions, and some script or resource loading problems.

This Security Header Generator helps you prepare common HTTP security headers such as Strict-Transport-Security, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy, and Content-Security-Policy directly in your browser.

Preparing Header Values Before Server Configuration

  1. Select the security headers you want to generate.
  2. Adjust HSTS, referrer, frame, and CSP options.
  3. Click Generate Headers.
  4. Copy the output and test it with your server or hosting setup.

Common Security Header Use Cases

  • Preparing starter security headers for a website.
  • Creating HTTPS-only HSTS header values.
  • Reducing MIME sniffing with X-Content-Type-Options.
  • Controlling framing with X-Frame-Options or frame-ancestors.
  • Generating a basic CSP before using a stricter policy.

Example Security Header Output

Strict-Transport-Security: max-age=31536000; includeSubDomains
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
Referrer-Policy: strict-origin-when-cross-origin
Permissions-Policy: camera=(), microphone=(), geolocation=()
Content-Security-Policy: default-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none';

Frequently Asked Questions

What does a security header generator do?

A security header generator prepares common HTTP security headers that can be added to a server, CDN, reverse proxy, or hosting platform configuration.

Can security headers break a website?

Yes. Strict CSP, permissions, or framing rules can block real scripts, styles, images, embeds, or API calls. Always test headers before using them in production.

Should I use HSTS preload immediately?

HSTS preload should be used carefully. Make sure HTTPS works correctly across the domain and subdomains before enabling preload.

Is anything uploaded to a server?

No. Header generation happens directly in your browser. Your settings and generated headers are not uploaded to a server.