HTTP Header Viewer

Paste raw HTTP headers and inspect them in a clean, searchable table.

Raw Headers

Paste headers copied from browser devtools, cURL, or API response logs.

Parsed Headers

Search and inspect parsed key-value pairs from your input.

No headers to display.

About HTTP Header Viewer

View HTTP response headers for any URL. Check cache control, CORS, content type, and security headers instantly. This page is part of UtilsNest's Developer Tools, so you can move between related workflows without leaving the browser.

How to use it

Enter or adjust the values, text, or file input needed for HTTP Header Viewer.
Review the generated result instantly and compare outputs until the result fits your use case.
Copy, download, or continue to a related developer tools workflow if you need the next step.

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Frequently Asked Questions

Why should I check HTTP headers?

Headers reveal caching behavior, security policies (CSP, HSTS), CORS settings, compression, and whether redirects are set up properly.

What is the X-Frame-Options header?

X-Frame-Options prevents your site from being embedded in iframes on other sites, protecting against clickjacking attacks.