Secure my domain and email
Check SSL, security headers, blacklists and email authentication. Use these 8 free tools in this order.
- 76 tools
- Free
- No sign-up
- 14 languages
1SSL Certificate CheckerCheck an SSL/TLS certificate’s validity, expiry date, issuer, hostnames and protocol.2Security Headers CheckerGrade a site’s HTTP security headers (CSP, HSTS, X-Frame-Options and more).3Mixed Content CheckerFind insecure http:// images, scripts and styles on an HTTPS page.4SPF, DKIM & DMARC CheckerCheck your email authentication: SPF, DKIM and DMARC records, with fixes you can copy.5Blacklist CheckerCheck whether a domain, its mail server or an IP address is on spam blacklists.6DNS LookupLook up A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records, plus SPF and DMARC.7WHOIS / Domain LookupFind a domain’s registrar, registration and expiry dates, status and name servers.8Domain Age CheckerFind out exactly how old a domain is and when it was first registered.
Not sure where to start?
Run a free audit of your whole page: over 80 checks with a clear list of what to fix first.