Security Headers Checker
Analyze HTTP security headers and get recommendations.
What is Security Headers Checker?
A Security Headers Checker reviews the HTTP response headers returned by a website and identifies whether important browser security controls are configured. It checks protections such as Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. These headers help reduce risks such as clickjacking, MIME sniffing, insecure transport, data leakage, and unsafe resource loading. By analyzing the headers and highlighting missing protections, the checker helps teams improve a website's defensive posture and understand where hardening is needed.
How Does Security Headers Checker Work?
A Security Headers Checker sends a request to the entered URL, reads the response headers, and compares them with a curated list of recommended security headers. Each header is marked as present or missing, assigned a severity level, and paired with a practical recommendation when it is not configured. The tool also calculates a simple score based on the protections found, making it easier to quickly assess the site's current setup and prioritize critical improvements such as HSTS and Content Security Policy.
