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HTTP Headers Checker

View all HTTP response headers from any URL — security headers, caching policies, content type, CORS settings, and more.

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How to use HTTP Headers Checker

  1. Enter a URL (e.g. https://example.com).
  2. Click Check Headers to fetch the response headers.
  3. Review all headers in the table below.

What is HTTP Headers Checker?

HTTP response headers convey important metadata about a web server’s response — content type, caching rules, security policies (CSP, HSTS, X-Frame-Options), CORS settings, and server information.

This tool fetches headers from any URL using a direct request or a CORS proxy fallback, displaying them in a clean table for analysis.

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FAQ

What are HTTP headers?
HTTP headers are key-value pairs sent by a web server with each response. They control caching, security policies, content encoding, cookies, and more.
Why use a CORS proxy?
Browsers block cross-origin requests by default. A CORS proxy fetches the headers server-side and relays them to your browser.
What security headers should I check for?
Look for Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.

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Author

NK
Prof. Noah Klein"The Privacy Guardian"

Cybersecurity Researcher & Privacy Advocate

Professor Klein holds a PhD in Information Security and has testified before EU parliamentary committees on data privacy legislation. He builds encryption tools for journalists, audits web applications for security flaws, and believes that privacy is not a feature but a fundamental right. His research has been cited in Wired, Nature, and The Guardian, and he advises nonprofits on responsible data stewardship.

📖 HTTP Headers Checker on Wikipedia·Network & Domain Tools on Wikipedia·HTTP Headers Checker on Britannica

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