SEOlvl / tools / headers
Tool · HTTP

HTTP headers checker

Inspect the response headers any URL returns — status code, server fingerprint, cache policy, security headers, and more. We issue a single HEAD request (with GET fallback) and show you everything.

Rate-limited to 10 requests/minute per IP.

FAQ

About HTTP headers

What are HTTP response headers?

Metadata the server sends alongside the response body — content type, caching rules, security policies (HSTS, CSP), redirect targets, and server identity. They tell the browser and search crawlers how to treat the page.

How do I use this tool?

Paste any URL and press Inspect. We send a HEAD request (with GET fallback) and show the status code and every header name/value pair the server returned.

Which headers matter for SEO?

Watch x-robots-tag, cache-control, content-type, and any redirect location. Crawlers honor robots directives in headers the same as in meta tags.

Are private hosts supported?

No — internal addresses (localhost, 10.0.0.0/8, etc.) are blocked. This tool only reaches public hosts on http or https.

One dashboard

Track this site — and 10k+ more — in one dashboard.

Daily Authority Score, backlink alerts, competitor tracking, custom reports. Free to start, no card required.