Edge Security

Security Headers & SSL Inspector

Check HSTS, CSP, X-Frame-Options, modern TLS versions, and automatic HTTPS redirection.

Embed this Tool on Your Website

Add this full interactive diagnostic tool directly into your own website, blog, or documentation.

Free & Iframe Ready

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technical guide & best practices

Web Security Headers: HSTS, CSP, and X-Frame-Options Best Practices

HTTP security response headers instruct modern browsers to enforce encrypted HTTPS connections, block cross-site scripting (XSS), prevent clickjacking, and restrict data leakage.

Key Optimization Standards

✓Set Strict-Transport-Security: max-age=31536000; includeSubDomains; preload.

✓Define Content-Security-Policy (CSP) to restrict script and resource execution.

✓Enforce X-Content-Type-Options: nosniff to prevent MIME-type sniffing.

✓Set X-Frame-Options: DENY or SAMEORIGIN to prevent embedding in malicious iframes.

frequently asked questions

Frequently Asked Questions

What is HSTS Preloading?

HSTS Preload is a browser-level whitelist (maintained by Google Chrome) that forces browsers to connect to your domain over HTTPS exclusively before the first request.

Why is CSP important for modern web apps?

Content Security Policy stops malicious inline scripts, unauthorized data exfiltration, and compromised third-party script injection.