HTTP Header Viewer
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See exactly what a server sends back. Inspect the full HTTP response headers for any URL, including status code, caching, content type, and security headers, with missing protections flagged.
Enter a URL to view its HTTP headers:
How the Header Viewer Works
- Safe fetch, the host is validated before our server requests the URL.
- Follow redirects, each hop is validated and the final URL is reported.
- Read headers, the complete response header set is captured.
- Audit security, key security headers are checked as present or missing.
Why Headers Matter
- Security, headers like HSTS and CSP defend against common attacks.
- Performance, cache and compression headers control speed and cost.
- Correct content, content type and charset ensure proper rendering.
- Debugging, status codes and redirects reveal what is really happening.
Next steps
HTTP Header Viewer related tools and articles
Continue with the closest follow-up checks and guides based on this tool's topic, crawl intent, and optimization workflow.
HTTP Header Viewer: FAQ
What does the HTTP header viewer do?
It sends a request to any URL and shows the full set of HTTP response headers the server returns, including status code, server software, caching, security headers, content type, and redirects, so you can inspect exactly what a browser or crawler receives.
Why would I check HTTP headers?
Headers control caching, security, content type, compression, and redirects. Viewing them helps you debug redirect chains, confirm security headers like HSTS and CSP, verify cache rules, and diagnose why a page behaves unexpectedly.
Which security headers should my site send?
The most important are Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, and Permissions-Policy. This tool highlights which of these are present and which are missing.
What does the status code tell me?
The HTTP status code shows the result of the request: 200 is OK, 301 and 302 are redirects, 404 is not found, and 500 range codes are server errors. The viewer reports the final status after following redirects safely.
Can it show the server and technology?
It surfaces the Server and X-Powered-By headers when present, which can reveal the web server and framework. Many hardened sites hide these on purpose, which is good for security.
Does it follow redirects?
Yes. The request follows redirects safely and validates each hop, then reports the final URL and status so you can see where a URL ultimately resolves.
Is checking headers safe and private?
Yes. The request runs from our server to the target URL and only reads response headers. Nothing about your check is stored or shared.
Is this HTTP header viewer free?
Yes. It is free, requires no signup, and works on any public URL.
Want a Secure, Well-Configured Site?
We set the right security headers, caching, and redirects so your site is fast, safe, and search-friendly.