Inspect cache and content headers
Enter a public URL to check content-type, cache-control, server, and CDN-related headers before publishing a change.
Web tools
HTTP Header Checker
Check public URL response headers, status codes, redirects, cache headers, security headers, and SEO header signals.
Checks public HTTP and HTTPS URLs. Private, local, and reserved network targets are blocked.
Header report
Run a check to inspect response headers, redirects, cache, security, and SEO signals.
Header details will appear here after the first check.
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About HTTP headers
HTTP response headers describe content type, caching, redirects, security policies, robots directives, and server behavior. They are useful when debugging production pages, APIs, and CDN changes.
Common uses
- Inspect cache-control and content-type headers
- Check HSTS, CSP, X-Frame-Options, and referrer policy
- Find x-robots-tag directives before indexing changes
- Confirm final headers after redirects
Web diagnostics workflow
- Use Redirect Checker first when a URL lands on the wrong page
- Use HTTP Header Checker to inspect the final response headers
- Use SSL Certificate Checker when HTTPS or HSTS behavior looks wrong
- Use DNS Lookup or WHOIS Lookup when the domain itself looks misconfigured
Notes
This checker follows a short public redirect chain and blocks local, private, and reserved network targets. Browser behavior can still differ because of cookies, cache, JavaScript, or CDN rules.
Examples
Review security and SEO signals
Check strict-transport-security, content-security-policy, x-frame-options, referrer-policy, and x-robots-tag headers in one report.
FAQ
Which headers does this checker highlight?ShowHide
It highlights common cache, content, security, SEO, and redirect headers such as content-type, cache-control, strict-transport-security, content-security-policy, x-robots-tag, and location.
Does it follow redirects?ShowHide
Yes. It follows a short public redirect chain and reports the final response headers, while still showing redirect hops when present.
Can this check private or local URLs?ShowHide
No. Local, private, and reserved network targets are blocked. The checker is intended for public HTTP and HTTPS URLs.
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