We offer SSL checker, HTTP security headers checker, WHOIS lookup, port scanner, email breach checker, disposable email detector, SPF/DMARC checker and more — all free, no account needed.
How does the SSL certificate checker work?
It connects to your domain and inspects the SSL/TLS certificate — checking validity, expiry date, issuer, cipher strength and whether the certificate chain is complete and trusted.
What is HTTP security headers grading?
Security headers like Content-Security-Policy, HSTS and X-Frame-Options protect against common web attacks. Our checker fetches live headers from any URL and grades them A to F based on which protective headers are present.
Is port scanning legal?
Port scanning your own servers is legal and standard practice. Scanning third-party servers without permission may violate laws in your jurisdiction. Only scan servers you own or have explicit permission to test.