HTTP Request & Response Header Inspector

RAW HTTP HEADERS INPUT

HTTP Headers Text

PARSED HEADERS & SECURITY ANALYSIS

A+

Security Header Score

Total Headers Parsed

Header Key	Value	Type
Paste headers above to inspect.

HTTP Request & Response Header Security Guide

HTTP headers pass additional metadata between client browsers and web servers. Implementing recommended security headers mitigates Cross-Site Scripting (XSS), Clickjacking, and Man-in-the-Middle (MITM) vulnerabilities.

Recommended Security Headers

Content-Security-Policy (CSP): Restricts trusted script sources to prevent XSS attacks.
Strict-Transport-Security (HSTS): Forces browsers to communicate exclusively over HTTPS.
X-Frame-Options: Prevents website framing inside malicious iframes.

Related Security & Developer Tools

Generate CSP headers with the CSP Header Generator, build HSTS headers with the HSTS Header Generator, or configure cross-origin access with the CORS Header Generator.

Frequently Asked Questions

Common questions about this tool.

How does the HTTP Header Inspector work? ▼

Paste raw HTTP response headers or request text. The inspector parses header keys and values, categorizing security headers, caching headers, and server signatures.

What key security headers are evaluated? ▼

Evaluates `Content-Security-Policy`, `Strict-Transport-Security` (HSTS), `X-Frame-Options`, `X-Content-Type-Options`, `Access-Control-Allow-Origin` (CORS), and `Referrer-Policy`.

Are my HTTP headers sent to remote servers? ▼

100% private. Header parsing and security score calculations execute locally in your web browser.

How do cache control headers work? ▼

`Cache-Control: max-age=3600, public` instructs browsers and CDNs (Cloudflare, Fastly) to cache response assets for 1 hour.

How can I generate missing security headers? ▼

Use our security header generators: <a href="/tools/csp-header-generator/">CSP Header Generator</a>, <a href="/tools/hsts-header-generator/">HSTS Header Generator</a>, and <a href="/tools/cors-header-generator/">CORS Header Generator</a>.