Get HTTP Headers

The HTTP Headers Checker reveals the response headers any URL's server sends — status code, server software, content type, caching, compression, security headers, and the full redirect chain. It's an essential diagnostic for debugging, SEO audits, and security reviews, surfacing things a visual page inspection can never show. Enter a URL and see the raw response. Free, with no signup.

See What the Server Actually Sends

Every time a browser requests a page, the server replies with a set of HTTP headers — metadata describing the content and how to handle it. These are invisible on the page itself but contain critical information: whether a redirect is the right type, whether compression is on, which security protections are active, and how caching is configured. This tool fetches and displays them all, including every step of any redirect chain.

How to Use It

1. Enter a URL.
2. Fetch the headers, following redirects.
3. Review the status, server, caching, and security headers.

Start With the Status Code

The first thing to read is the status code: 200 means success, 301 is a permanent redirect, 302 a temporary one, 404 means not found, and 500-range codes signal server errors. This matters more than it sounds — using a temporary 302 where you meant a permanent 301 can quietly undermine SEO, and an unexpected 404 or 500 points straight to a problem.

An SEO Audit in the Headers

Several headers carry real SEO weight. Confirm redirects use the 301 (permanent) that passes ranking signals rather than a 302. Check for an X-Robots-Tag that might be controlling indexing, and a canonical link delivered via header. These signals are sent at the HTTP level, so a visual inspection of the page never reveals them — the header check does.

Performance: Compression and Caching

Two header families reveal your speed setup. Content-Encoding shows whether the server is sending gzip or br (Brotli) compressed content, and Cache-Control, Expires, and ETag reveal how browsers and CDNs are told to cache the resource. If compression is off or caching is misconfigured, you've found an easy, high-impact performance fix.

Audit Your Security Headers

The response headers are also a fast security checklist. Look for:

• Strict-Transport-Security (HSTS) — enforces HTTPS.
• Content-Security-Policy — limits what can load, mitigating XSS.
• X-Frame-Options — prevents clickjacking.
• X-Content-Type-Options — stops MIME-type sniffing.

Their presence signals a hardened site; their absence highlights quick wins.

Follow the Redirect Chain

A single URL can bounce through several redirects before landing on the final page, and each hop has its own status and headers. Seeing the full chain exposes redirect loops, unnecessary extra hops that slow loading, and inconsistent redirect types. For both SEO and speed, a clean, minimal redirect path is what you want — and this is how you verify it.

A Note on Exposed Technology

Headers like Server and X-Powered-By can reveal your web server and backend technology. That's handy for research, but it's also why security-conscious sites minimize them — broadcasting your exact software version hands attackers a head start. Checking your own headers shows what you're currently exposing. Free, with no signup.

HTTP Headers FAQs

What are HTTP headers and why check them?

HTTP headers are metadata a web server sends with every response, describing the content and how the browser should handle it. Checking them reveals the status code, the server software, the content type, whether compression and caching are enabled, which security headers are set, and where redirects point. It's an essential diagnostic for debugging, SEO audits, and security reviews.

What is an HTTP status code?

It's a three-digit number indicating the result of the request. 200 means success; 301 is a permanent redirect and 302 a temporary one; 404 means not found; and 500-range codes indicate server errors. The status code is often the first thing to check, since the wrong redirect type or an unexpected 404 can cause real SEO and functionality problems.

How does this help with SEO?

Several headers directly affect SEO. The status code shows whether redirects use the SEO-friendly 301 (permanent) rather than 302 (temporary), an X-Robots-Tag header can control indexing, and a canonical link can be delivered via header. Checking these confirms search engines are receiving the signals you intend, which a visual page inspection alone can miss.

Can I see if compression and caching are enabled?

Yes. The Content-Encoding header shows whether the server is sending gzip or Brotli compressed content, and caching headers like Cache-Control, Expires, and ETag reveal how browsers and CDNs are told to cache the resource. Both are key performance factors, so confirming they're configured correctly is a quick win for speed.

What security headers should I look for?

Important ones include Strict-Transport-Security (HSTS, which enforces HTTPS), Content-Security-Policy (which limits what resources can load, mitigating XSS), X-Frame-Options (which prevents clickjacking), and X-Content-Type-Options. Their presence indicates a hardened site; their absence highlights easy security improvements. The header check is a fast way to audit them.

Why does the tool follow redirects?

Because a single URL can chain through several redirects before reaching the final page, and each hop has its own status and headers. Seeing the full chain helps you spot redirect loops, unnecessary extra hops that slow loading, or a mix of 301s and 302s. For SEO and performance, a clean, minimal redirect path matters.

Can checking headers reveal a site's technology?

Often, yes. Headers like Server and X-Powered-By can disclose the web server (such as Nginx or Apache) and backend technology. That's useful for research, but from a security standpoint it's also a reason many sites minimize these headers — revealing your exact software version gives attackers a head start. The tool lets you see what your own site is exposing.

Is the tool free?

Yes, it's free with no signup. Enter any URL to inspect its full HTTP response headers instantly.