Get HTTP Headers
Inspect raw server response headers, HTTP status codes, security policies, and CDN cache headers for any URL.
Free HTTP Response Headers Checker
Inspect raw server response headers, HTTP status codes, security policies, and CDN cache headers for any URL.
Quick Answer & Overview
The HTTP Headers checker inspects the raw response headers returned by any web server. It provides immediate visibility into HTTP status codes (200, 301, 404), cyber security headers (HSTS, CSP, X-Frame-Options), Cache-Control rules, and server technology signatures.
Enter Web URL
Enter the full domain or page URL (e.g., https://example.com) you wish to inspect.
Send HEAD / GET Request
Our server issues an authentic HTTP request mimicking modern browser client headers.
Parse Response Headers
We parse status codes (200, 301, 404, 500) and security headers (HSTS, CSP, X-Frame-Options).
Analyze Security & Caching
Review header parameters, cache controls (`max-age`, `s-maxage`), server identity, and security scores.
Audit Web Server Health, Security & SEO Headers
HTTP headers operate behind the scenes on every web page request. Hidden issues—such as an accidental X-Robots-Tag: noindex header, missing HTTPS enforcement (HSTS), or broken cache headers—can devastate SEO rankings and leave servers exposed to web vulnerabilities.
Status Code Verification
Ensure URLs return clean 200 OK or proper 301 Moved Permanently redirects.
Security Header Audit
Verify presence of HSTS, CSP, X-Content-Type-Options, and Referrer-Policy headers.
Cache-Control Inspection
Inspect browser caching rules and CDN edge TTL headers (Cloudflare, Fastly, CloudFront).
Critical HTTP Headers Reference Table
| Header Key | Recommended Value | Security / SEO Function |
|---|---|---|
| Strict-Transport-Security | max-age=31536000; includeSubDomains | Forces encrypted HTTPS connections permanently. |
| X-Frame-Options | DENY or SAMEORIGIN | Prevents clickjacking inside rogue iframes. |
| X-Robots-Tag | index, follow | Controls search engine crawling at header level. |
Frequently Asked Questions
What are HTTP response headers?
HTTP headers are key-value metadata pairs sent by a web server alongside requested content. They instruct browsers how to handle caching, security policies, cookie storage, and content types.
Why should I inspect HTTP security headers?
Security headers like `Strict-Transport-Security` (HSTS), `Content-Security-Policy` (CSP), and `X-Frame-Options` protect your site against Clickjacking, Cross-Site Scripting (XSS), and man-in-the-middle attacks.
Can this tool diagnose 301 and 302 redirection loops?
Yes. The tool reveals the exact status code and `Location:` response header, allowing you to debug redirection chains and canonical issues.
How do headers affect search engine crawlers (Googlebot)?
HTTP status codes tell Googlebot whether pages are indexable (200 OK), moved (301 Permanent Redirect), or deleted (404/410). Headers like `X-Robots-Tag: noindex` directly control search engine visibility.
Is this tool free with no limits?
Yes. You can test any public URL with zero fees, subscriptions, or limits.
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