HTTP Header Checker

Inspect HTTP response headers and server configuration for any URL.

Inspect response headers

Enter a direct URL to read HTTP headers before redirects or caches modify them.

What does this tool do?

The HTTP Header Checker fetches a URL without following redirects so you can review status codes, response times, and server headers.

Why use this tool?

Debug caching

Inspect Cache-Control and Content-Length headers.

Verify servers

Confirm new deployments return the correct server info.

Audit redirects

See if Location headers are properly configured.

FAQ

HTTP Header Checker FAQ

Audit server responses and caching rules.

What does the header checker return?

It lists every response header, including caching, security, and server metadata.

Can it confirm HSTS or CSP?

Yes, security headers like Strict-Transport-Security or Content-Security-Policy are clearly displayed.

Why review headers before campaigns?

Headers influence how platforms cache pages, treat cookies, and display content to users.

Does it fetch just once?

Each request is a single fetch so you get a clean view of the live server configuration.

Sample header snapshot

Use the header log to confirm cache rules, SSL policies, and redirect targets:

HTTP/2 200 OK
cache-control: max-age=0, private
strict-transport-security: max-age=63072000
location: https://offer.example/thank-you

Inspect HTTP headers on demand

Fetch a URL without following every redirect so you can see status codes, headers, and response times.

  • Validate Cache-Control, HSTS, CORS, and server headers.
  • Confirm new infrastructure returns the correct protocol and host.
  • Share header diffs with CDN, hosting, or compliance teams.

Use it when

  • •

    Rolling out new CDN or edge caching rules.

  • •

    Debugging landing pages that send the wrong headers.

  • •

    Preparing documentation for advertiser audits.

Practical examples

Check cache behavior

Verify Cache-Control and Expires headers before enabling a caching rule.

Troubleshoot redirects

Inspect Location headers for each hop when canonical links misbehave.

Confirm security headers

Ensure strict-transport-security and content-security-policy are present after deployments.

Contextual resources

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