Free network tool
HTTP Header Checker
See the HTTP status and response headers any URL returns — server, security and caching details.
Live results. Public network data is never stored.
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Why use this tool
HTTP headers are metadata a server sends with every response. They reveal the server software, content type, caching rules, security policies and more.
Use this tool to inspect your own site, verify security headers, or understand what a URL returns before you integrate it.
Features
HTTP status code and reason
All response headers listed
Security headers highlighted
Response time measured
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How it works
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1
Enter a full URL (https://…)
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2
Click "Check"
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3
Review the status and headers
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Frequently asked questions
What are HTTP headers?
Metadata the server sends with a response — server type, content-type, caching and security policies.
Which security headers should a site have?
Strict-Transport-Security, Content-Security-Policy, X-Frame-Options and X-Content-Type-Options are the basics.
Why check response headers?
To debug caching, confirm a redirect, verify security posture, or understand an API response.