No signup. No limits. Just useful tools for website owners.
HTTPS, security headers, SSL grade — scored out of 100 with fix suggestions. Enter any domain and get results in seconds.
Run Free Check →Check SSL chain, expiration date, cipher strength, and TLS version support. Know before your cert expires.
Test SSL →View A, MX, TXT, SPF, DKIM, DMARC records. Spot misconfigurations before attackers do.
Check DNS →HSTS, CSP, X-Frame-Options, X-Content-Type-Options — full breakdown with remediation tips.
Audit Headers →Registration date, expiry, registrar, nameservers. Know when your domain needs renewal.
Lookup WHOIS →XML-RPC exposure, wp-json leaks, readme.html, plugin enumeration — free WP-specific checks.
Scan WP Site →Generate a "Protected by SiteDef" badge for your site. Live security score, always up to date.
Get Badge →Free WordPress plugin with quick scan, hardening advisor, and Pro upgrade for advanced protection.
Get Plugin →