Question 1

How do I check an SSL certificate online?

Accepted Answer

Enter any domain name (e.g., example.com) and click Check SSL. The tool connects to the server, retrieves the certificate, and displays issuer, validity dates, days until expiry, protocol version, and cipher suite.

Question 2

What does this SSL checker detect?

Accepted Answer

It detects expired certificates, certificates expiring soon (within 30 days), self-signed certificates, weak cipher suites, and incomplete certificate chains. Each issue is flagged with a clear warning.

Question 3

Do I need to include https:// in the domain?

Accepted Answer

No. Just enter the bare domain (e.g., example.com). The tool automatically connects on port 443 using TLS. You can optionally specify a custom port with domain:port syntax.

Question 4

Is my data sent to a server?

Accepted Answer

The domain name is sent to our server to establish the TLS connection and retrieve certificate details. No other data is collected or stored.

Question 5

Can I check certificates on non-standard ports?

Accepted Answer

Yes. Use the format domain:port (e.g., example.com:8443) to check SSL certificates on any port, not just the default 443.

SSL Certificate Checker

More Free Tools

Need to process data at scale?