Free Tools
Free website security tools for focused checks.
Check one issue at a time across headers, HTTPS, CSP, cookies, CORS, mixed content, email authentication, and JavaScript libraries. When you need the complete picture, WebSentry turns those checks into a full security report with monitoring.
Security Headers Checker
Scan for HSTS, X-Frame-Options, CSP, Referrer-Policy, Permissions-Policy, and other browser hardening headers.
Open toolSSL/TLS Checker
Check certificate validity, HTTPS redirects, TLS posture, HSTS, and common SSL configuration issues.
Open toolCSP Analyzer
Find missing CSP, unsafe directives, weak script policies, and places where browser-side protection can improve.
Open toolCookie Security Checker
Inspect cookie Secure, HttpOnly, and SameSite attributes so sessions are harder to steal or misuse.
Open toolCORS Checker
Check for permissive CORS policies that can expose APIs or authenticated resources to unwanted origins.
Open toolMixed Content Checker
Find scripts, styles, images, forms, and embeds loaded over HTTP on otherwise secure pages.
Open toolDMARC, SPF & DKIM Checker
Review SPF, DKIM, and DMARC signals that help stop spoofing and protect your domain reputation.
Open toolJavaScript Library Vulnerability Checker
Detect common JavaScript libraries and flag versions that may have known security issues or update needs.
Open toolNeed the full security workflow?
Run the complete WebSentry scan for an A-F grade, then create an account when you are ready to save history, export reports, and monitor sites for grade drops.