SelfSignedCert

Tools / Web ports, not a full nmap.

Free tool

Web ports, not a full nmap.

We cannot run nmap on Vercel — no raw sockets, short timeouts, and it would turn this site into a scan service. What we do: a TCP check of 80, 443, 8080, and 8443 on a public host, with private IPs blocked. For a real nmap, copy the command and run it on a machine you control, only against hosts you are allowed to test.

More nmap locally

nmap -sV -p 80,443 example.com
nmap --script ssl-cert,ssl-enum-ciphers -p 443 example.com
nmap -Pn -p 80,443,8080,8443 example.com