http header checker
Free HTTP Header Checker
Inspect the HTTP response headers for any URL. Free tool that shows security headers, cache directives, content-type, and SEO-relevant headers with one click — plus flags missing critical security headers.
Built for http header checker
Inspect the headers that affect crawling, caching, and security
An HTTP header checker helps you see the server-side signals browsers and crawlers receive before they render the page: cache rules, redirects, content type, robots directives, and security policies.
That makes it useful for technical SEO audits, CDN debugging, and launch QA when a page looks fine in the browser but still behaves incorrectly in Googlebot or edge caches.
Common use cases
- Verify x-robots-tag, cache-control, and canonical-related link headers
- Check missing HSTS, CSP, and other security headers after deployment
- Compare HEAD and GET responses when a CDN or proxy is misbehaving
How to Use the HTTP Header Checker
- 1Enter the full URL you want to inspect
- 2Choose HEAD (lightweight) or GET (some servers only send full headers on GET)
- 3Click Check Headers to fetch and return the response
- 4Review security headers (HSTS, CSP, X-Frame-Options, etc.) with present/missing flags
- 5Inspect SEO-relevant headers (cache-control, x-robots-tag, link) to spot misconfigurations
Frequently Asked Questions
AI Search Guides
Connect this tool to the bigger AI-search workflow
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GEO
Generative Engine Optimization
The core GEO framework, case study, and operating model for AI search visibility.
AEO
Answer Engine Optimization
How to structure pages so answer engines can retrieve, trust, and cite them.
GEO SEO
GEO SEO
How generative engine optimization fits into modern SEO and why the overlap matters.
AI Search
AI Search Optimization
The broader system behind modern AI search visibility across prompts, pages, and engines.
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