Sicurezza e certificati
Verifica certificato SSL online
Analizza un certificato SSL/TLS, la validità, le date, l'emittente e i domini coperti.
Guida SSL/TLS
Cos'è un certificato SSL/TLS?
Un certificato SSL/TLS consente connessioni HTTPS cifrate e aiuta a verificare l'identità del server.
Cosa controlla questo strumento?
Controlla connessione TLS, date, hostname, emittente, nomi alternativi e impronta.
Cosa sono i SAN?
I Subject Alternative Names indicano domini e sottodomini coperti dallo stesso certificato.
Domande frequenti
Domande frequenti sui certificati SSL
How do I check an SSL certificate?
Enter the domain, keep port 443 and select Check SSL.
When does my SSL certificate expire?
The result shows the expiration date and remaining days.
How do I know if a certificate covers my domain?
The tool compares the hostname with the CN and Subject Alternative Names.
What does self-signed certificate mean?
It means the certificate is signed by itself rather than a recognised trusted authority.
What is a wildcard certificate?
A wildcard such as *.example.com covers one subdomain level, not every nested level.
What are Subject Alternative Names?
They are additional names included in a certificate for other valid domains.
What happens when a certificate expires?
Browsers may show warnings and the connection is no longer considered trusted.
What is the difference between SSL and TLS?
TLS is the modern protocol that replaced SSL, although SSL remains a common term.