Website Security Headers Checker
Inspect HTTP security response headers including Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, and Permissions-Policy.
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Website Security Headers Checker is Entering Beta
We are engineering a 100% private, on-device engine for this tool using WebAssembly. Your files and data will never be sent to any server.
How to website security headers checker in 3 simple steps
Enter website domain
Type the website URL you wish to audit (e.g., example.com).
Analyze response headers
The scanner inspects modern security header directives and configurations.
View security grade
Review recommendations and remediation snippets to secure your website.
Frequently Asked Questions
What are HTTP security headers?
Security headers are directives returned by web servers that instruct user browsers how to safely handle site content and prevent injection attacks.
Why is Content-Security-Policy (CSP) vital?
CSP prevents Cross-Site Scripting (XSS), clickjacking, and unauthorized data injection attacks by restricting resource load origins.
What does HSTS do?
HTTP Strict Transport Security (HSTS) enforces encrypted HTTPS connections, preventing man-in-the-middle downgrade attacks.
When will the live checker launch?
The live HTTP header audit engine is currently entering beta verification.
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