HTTP Header Checker: Audit Response Headers & Security Status

Website URL to Analyze

Quick Test:

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Audit HTTP & Security Headers

Enter any URL to test for HSTS, CSP, X-Frame-Options, server leakages, and security score.

Inspect server response codes (200, 301, 302, 404, 500), evaluate HTTP Strict Transport Security (HSTS), Content-Security-Policy (CSP), and cache-control headers. 99tools HTTP Header Checker audits server security configurations in seconds.

Quick Guide

How to Use HTTP Header Checker: Audit Response Headers & Security Status in 3-4 Simple Steps

Enter URL

Type the complete web address with https://.

Fetch Headers

Click Check Headers to inspect raw HTTP response headers.

Audit Security Headers

Review security configurations including Content-Security-Policy and HSTS.

Need Help?

Frequently Asked Questions

Everything you need to know about this tool, accuracy, formulas, and privacy.

Why are HTTP response headers important for SEO and security?

HTTP headers tell browsers and search engines how to handle page content, caching, redirects (301/302), canonical tags, and security protocols like strict transport security (HSTS).

HTTP Header Checker: Audit Response Headers & Security Status

Key Security Headers Checklist

All Server Response Headers

How to Use HTTP Header Checker: Audit Response Headers & Security Status in 3-4 Simple Steps

Enter URL

Fetch Headers

Audit Security Headers

Frequently Asked Questions

HTTP Header Checker: Audit Response Headers & Security Status

Key Security Headers Checklist

All Server Response Headers

How to Use HTTP Header Checker: Audit Response Headers & Security Status in 3-4 Simple Steps

Enter URL

Fetch Headers

Audit Security Headers

Frequently Asked Questions

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