Free tool · no signup

Security Headers Checker

Verify HSTS, CSP, X-Frame-Options and more — no signup required

Free instant check · 5 live signals · no signup required
What We Check 8 checks in this tool

Strict-Transport-Security

HSTS header — forces browsers to use HTTPS for a specified period.

Content-Security-Policy

CSP header — prevents XSS and data injection attacks.

X-Frame-Options

Prevents clickjacking by controlling iframe embedding.

X-Content-Type-Options

Prevents MIME-type sniffing (nosniff).

Referrer-Policy

Controls how much referrer information is shared.

Permissions-Policy

Restricts browser features (camera, microphone, geolocation).

Cross-Origin Policies

CORP, COEP, COOP headers for cross-origin isolation.

Cookie Security

Secure, HttpOnly, SameSite attributes on all cookies.

This tool is a small window into the full engine

The complete audit runs 272 scanners — OWASP, SQL injection, WordPress suite (WPScan), technology fingerprinting (WhatWeb), the full 13,000-template Nuclei pack, and exploit-availability intelligence from ExploitDB & Metasploit — in one professional report.

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This checker covers a fraction of our 276-scanner assessment. Run a full scan for a complete report.