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We have a top-notch Server Headers Checker tool. It checks HTTP response headers in real-time. It's key for developers, system admins, SEO experts, and security pros to see how servers talk to clients.
Our tool shows everything from cache policies to security settings. It uncovers all the details of server communication.
HTTP response headers are data sent between a server and a client when you visit a webpage. They control how content is delivered, stored, redirected, or kept safe.
Some important HTTP headers are:
Server
Content-Type
Content-Encoding
Cache-Control
Location
X-Frame-Options
Strict-Transport-Security
Set-Cookie
Content-Security-Policy
Our tool quickly gets the full HTTP response headers of any URL. It includes:
HTTP/1.1, HTTP/2, or HTTP/3 response codes
All relevant response headers
Redirect chains (up to 10 hops)
We show the full redirect paths. This includes status codes (301, 302, 307, 308) and intermediate URLs. It helps with debugging and SEO insights.
Get detailed info on HTTP security headers like:
Strict-Transport-Security (HSTS)
Content-Security-Policy (CSP)
X-Content-Type-Options
X-XSS-Protection
X-Frame-Options
Referrer-Policy
We point out missing headers and offer advice.
Check cache directives to see:
Content freshness
CDN behavior
Resource revalidation (ETag, Last-Modified)
mermaid
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graph TD A[User Enters Website URL] --> B[Send HTTP GET Request] B --> C[Server Responds with Headers] C --> D{Analyze Header Types} D --> E[Security Headers] D --> F[Redirects & Status Codes] D --> G[Content and Cache Policies] E --> H[Check for Vulnerabilities] F --> I[Map Redirect Chain] G --> J[Evaluate Cache Settings]
Header | Function | Importance |
---|---|---|
Content-Type | Declares file type (e.g., text/html, application/json) | Prevents misinterpretation of content |
Server | Discloses server software | Useful for diagnostics but should be obfuscated |
Location | Handles redirects | Critical for SEO and user routing |
Cache-Control | Sets browser cache policy | Boosts performance |
Strict-Transport-Security | Enforces HTTPS | Enhances security |
Set-Cookie | Manages session and user data | Affects stateful browsing |
Content-Security-Policy | Prevents XSS attacks | Essential for modern web security |
Easily detect:
Redirect loops
Improper 301 vs 302 usage
Mixed protocol redirection (HTTP to HTTPS or vice versa)
Each redirection displays:
Status code
Final and intermediate URLs
Header differences across hops
Make sure your site correctly redirects http:// to https:// and www to non-www (or vice versa) using 301 redirects.
Headers like Cache-Control, ETag, and Content-Encoding: gzip help improve performance and Core Web Vitals scores.
Check for essential HTTP security headers. Not having headers like X-Frame-Options can make your site vulnerable to clickjacking.
Use our RESTful Server Headers API for automated checks:
Endpoint: /api/header-check?url=
Returns: JSON payload with all response headers and redirect data
Includes: timestamp, TTL, status code, header metadata
Great for CI/CD environments and automated monitoring tools.
Feature | Benefit |
---|---|
Real-time lookup | Accurate insights from live server response |
No installation | Fully browser-based |
Multi-hop redirect tracing | Uncover hidden routing issues |
HTTP/2 & HTTP/3 support | Future-proof compatibility |
Exportable reports | Share header data with teams or clients |
Audit redirect setup
Monitor server configuration after migration
Verify CSP, HSTS, and anti-clickjacking headers
Identify information disclosure via Server or X-Powered-By
Ensure correct HTTP status for crawlability
Detect unnecessary redirects or delays
Troubleshoot CORS and preflight headers
Validate Access-Control-Allow-Origin and Allow headers
Request headers are sent by the client (browser). Response headers are returned by the server. They provide metadata about the resource or server behavior.
Yes. Our tool shows complete headers for 3xx, 4xx, and 5xx responses.
Yes, our checker works with all modern protocols. This includes HTTPS, HTTP/2, and HTTP/3.
Yes, our header checker's core features are 100% free. You don't need to register to use them.
Use our Server Headers Checker for deep diagnostics. It helps you debug, secure, or optimize your server. This tool gives you the clarity and control you need.
Instant Results. Full Visibility. Total Header Intelligence.
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