Inspects the SSL/TLS certificate of a domain: validity status, start and end dates, issuer and covered domains (SAN).
What Is an SSL Certificate?
An SSL/TLS certificate encrypts the traffic between the browser and the server, ensuring that data is transmitted securely. The padlock icon in the address bar and the https:// prefix indicate that such a certificate is present. An invalid or expired certificate appears to visitors as a security warning.
Information This Tool Shows
- Validity: Is the certificate currently valid?
- Start / End date and days remaining.
- Issuer: The authority that issued the certificate.
- SAN: All domains covered by the certificate (e.g.
*.ornek.com).
How to Use It
- Enter the domain name (
ornek.com). - Check the end date and the number of days remaining.
Tip: Certificates are usually valid for 90 days to 1 year. To avoid downtime, automate renewal. With Bogahost SSL you can set up free/automatic installation.
Frequently Asked Questions
My certificate is about to expire, what should I do?
Renew it before the expiry date. Let’s Encrypt certificates are usually renewed automatically; commercial certificates require renewal and reinstallation.
What causes an “invalid certificate” error?
The main causes are expiration, a domain name mismatch (not listed in the SAN), a missing intermediate certificate (chain), or an untrusted authority.
What is a wildcard certificate?
It is a certificate in the form *.ornek.com that covers all subdomains of a domain. It appears in the SAN list with an asterisk.
