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HTTP Headers Viewer — Inspect Any URL's Response Headers | TestURL.live
HTTP

HTTP Headers Viewer — See Every Response Header For Any URL

The browser-friendly version of curl -I. Drop in any URL, get the full set of response headers — status, content-type, caching, cookies, server, security headers, everything. Switch between GET and HEAD methods.

Comparing old vs new server?

Get the preview URL from TestURL.live and inspect headers on the new server before flipping DNS — catch differences in caching, cookies, or security headers.

Test Your Migration →

What HTTP Headers Tell You

HTTP response headers carry the metadata that makes a website work: caching strategy, content type, cookies, security policy, redirect targets, CDN routing, content encoding, and the server identity. The browser uses them on every request — and they're often the first place to look when something is misbehaving.

Common Headers You'll See

HTTP Headers FAQ

What's the difference between GET and HEAD?

GET fetches the URL with a full body. HEAD requests only the headers — same response shape, no body. Most servers return identical headers for both, but some (CDN edges, broken middleware) behave differently, so the viewer lets you switch.

Why are some headers missing from my response?

Reverse proxies, CDNs, and middleware can strip or replace headers en route. If a header is missing from the response but present in your origin config, check the layers in front — Cloudflare, CloudFront, a load balancer, or upstream rewrites.

How does this differ from curl -I?

Functionally similar — but with a clean UI, status badge, IP shown, timing measured, and shareable results.

Does it follow redirects?

No. For redirects, use our Redirect Chain Checker, which traces every hop. The headers viewer shows only the immediate response.

Related Tools

Security Headers CheckerHSTS, CSP, X-Frame-Options grade Redirect Chain CheckerTrace every redirect SSL CheckerValidate the TLS cert DNS Propagation CheckerWhere does it resolve?