Enter a website URL to check its security headers
Why Security Headers Matter
Security headers provide an additional layer of protection against common web vulnerabilities.
How to Analyze Security Headers
- 1
Enter the target URL
Type or paste the full URL of the website you want to analyze into the input field. Include the protocol (https://) for accurate results. The tool accepts any publicly accessible web address. - 2
Run the analysis
Click the Analyze Headers button to start the scan. The tool sends a request to the target URL and inspects every HTTP response header returned by the server, checking for the presence and correct configuration of security-critical headers. - 3
Review the security score and grade
After the scan completes, review the overall security score and letter grade. Each header is listed with a pass or fail status. Missing headers are flagged with specific recommendations explaining what attack they prevent and how to implement them. - 4
Fix missing headers and re-test
Use the recommendations to add or correct headers in your web server, application code, or CDN configuration. After deploying changes, return to the analyzer and run a fresh scan to confirm all headers are properly configured.
Who Uses Security Headers Analysis
Web Developers and DevOps Engineers
Security Auditors and Penetration Testers
Site Owners and IT Managers
SEO and Compliance Teams
Why Check Security Headers?
HTTP security headers are directives sent by a web server in every response that instruct the browser how to handle page content. When properly configured, they block entire categories of attacks including cross-site scripting, clickjacking, protocol downgrade, and data injection. The Security Headers Analyzer scans any public URL and evaluates its headers against current best practices, producing a score, a letter grade, and actionable recommendations for every missing or misconfigured header.
The analyzer checks for ten critical headers: Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, X-Content-Type-Options, X-XSS-Protection, Referrer-Policy, Permissions-Policy, Cross-Origin-Opener-Policy, Cross-Origin-Embedder-Policy, and Cross-Origin-Resource-Policy. Each header targets a specific threat vector. For example, CSP prevents unauthorized script execution, HSTS forces encrypted connections, and Permissions-Policy restricts access to browser APIs like camera and geolocation. Together they form a layered defense that complements application-level security.
Security header analysis pairs naturally with other checks in a complete website audit. Use the SSL Certificate Checker to verify your TLS configuration, the DNS Security Scanner to inspect DNSSEC and DNS records, and the Cookie Analyzer to confirm cookies use Secure and HttpOnly flags. For broader threat detection, the URL Safety Checker screens URLs against known malware and phishing databases. Running all of these tools together gives a comprehensive view of your site's security posture.
How It Compares
Dedicated security header scanners like SecurityHeaders.com and Mozilla Observatory offer server-side analysis that can read all response headers without browser CORS restrictions. These services are useful for deep audits but often require navigating external sites and may rate-limit free usage. The FindUtils Security Headers Analyzer provides instant in-browser analysis with a clean pass/fail breakdown and specific fix recommendations, making it ideal for quick checks during development or deployment. For the most thorough audit, combine this analyzer with a server-side scanner and manual review of your web server or CDN configuration.
Browser developer tools (the Network tab in Chrome or Firefox) also display response headers, but they require manually inspecting each header and knowing what values are correct. The analyzer automates this by grading each header against security best practices and highlighting exactly what is missing, saving significant time compared to manual inspection.