Enter a URL to check its security headers.
Check HTTP security headers including HSTS, CSP, X-Frame-Options and more.
Security Headers Checker tests websites for security header configuration. See also: cors-checker or hsts-checker.
Enter the required information, configure your preferences, and click the process button. The tool performs the security analysis or generation using client-side algorithms and displays the results instantly. No data is transmitted externally.
Yes, all processing happens locally in your browser. No sensitive data is transmitted.
The tool is suitable for quick checks but should complement, not replace, dedicated security tools.
Yes, it is completely free with no restrictions on usage.