HTTP Headers Viewer

How to Use the HTTP Headers Viewer

1. Enter URL: Type the full URL of any website (e.g., "https://google.com", "https://faizankhichi.me") into the input field.
2. Select Method: Choose HTTP method — GET (standard page request), HEAD (headers only, no body), or POST (submit request).
3. Fetch Headers: Click "Fetch Headers" or press Enter. The tool sends the request via a proxy worker and displays all response headers received from the server.
4. Review Results: See the HTTP status code (200 OK, 301 Redirect, 404 Not Found, etc.), final URL (after redirects), and every header key-value pair.
5. Security Audit: The Security Headers Checker automatically scans for 7 critical security headers (HSTS, CSP, X-Frame-Options, etc.) showing which are present or missing.

Technical Overview & Use Cases

This tool sends HTTP requests through a Cloudflare Worker proxy that fetches the target URL and returns the complete response headers as JSON. This proxy approach bypasses CORS restrictions that would prevent browser-to-browser header inspection. The Security Headers Checker evaluates the response against OWASP recommended security headers — HSTS (HTTP Strict Transport Security), CSP (Content Security Policy), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and X-XSS-Protection.

Real-world use cases:

• Security auditing: Check if a website implements proper security headers. Missing CSP enables XSS; missing X-Frame-Options enables clickjacking; missing HSTS allows SSL stripping attacks.
• CDN & caching verification: Inspect Cache-Control, ETag, Age, and X-Cache headers to verify your CDN (Cloudflare, CloudFront, Fastly) is caching content correctly and serving from edge.
• API debugging: Examine Content-Type, CORS headers (Access-Control-Allow-Origin), rate-limit headers (X-RateLimit-Remaining), and authentication headers when troubleshooting API integrations.

Privacy & Security Guarantee

This tool is part of the FAK LAB ecosystem, founded by Faizan Ahmad Khan Khichi. The URL you enter is sent to a proxy worker that fetches the target's response headers. Only the URL is transmitted — no cookies, authentication tokens, or personal data from your browser are forwarded. The proxy does not store, log, or cache your queries. The target website sees a request from the proxy server, not from your IP address.

Frequently Asked Questions

What are HTTP headers?

HTTP headers are metadata sent between client and server with every request and response. Response headers tell the browser how to handle content (caching, encoding, security policies, content type, server software). They're invisible to normal users but critical for developers — controlling security, performance, and functionality of web applications.

Why do some websites show fewer headers than expected?

Some servers strip or minimize headers for security (hiding server version information), performance (reducing response size), or CDN behavior (CDN edge servers may modify headers before forwarding). CORS-related headers may also only appear for specific request origins, not for all requests.

What does it mean if security headers are "Missing"?

Missing security headers indicate the website hasn't implemented that specific protection. For example: missing HSTS means the site can be downgraded from HTTPS to HTTP; missing CSP means inline scripts can execute (XSS risk); missing X-Frame-Options means the site can be embedded in attacker-controlled iframes (clickjacking risk). These are findings a security auditor would flag.