Does it show details like the expiry date or certificate chain?

No. This is a basic check based on whether the connection succeeds. For expiry date and chain details, use the SSL Certificate Viewer tool alongside this one.

What does it mean if the check fails?

It could be caused by an expired or mismatched certificate, the server being down, DNS issues, and more. Use the error message to narrow down the cause.

Is the domain I enter stored?

No. It simply attempts a connection immediately for each request.

Expiry is near — now what?

Renew with your CA. Let's Encrypt certs last 90 days, so auto-renewal (certbot) is the norm.

How far does a *.example.com wildcard reach?

One subdomain level: a.example.com works, a.b.example.com does not.

🩺 SSL Checker

Connect to a domain over HTTPS to check whether the SSL certificate is trustworthy and correctly installed.

ℹ️ This is a basic check based on connection success. It does not provide expiry date or chain details.

Domain

How to use

Enter the domain to check.
Click "Check".
The HTTPS connection result and response time are displayed.

🎯 Use Cases

Confirm a newly issued certificate has been applied correctly
Check that HTTPS works properly after a domain migration
Quickly check the SSL status of multiple servers

Example

Input

example.com

Output

✅ The SSL certificate is installed correctly and the HTTPS connection succeeded
HTTP 200 · 177ms

After attempting an HTTPS connection to the domain, a successful handshake with a trusted SSL certificate shows the response status code (HTTP 200) and the response time. The values above are an illustrative example; actual results depend on the server's state.

What the checks mean

Connects to the domain over HTTPS and inspects the certificate.

Check	Meaning
Validity	Imminent expiry — browsers block expired certificates
Domain match	SAN/CN must match the host being visited
Trusted issuer	A trusted CA chain — self-signed triggers a warning
Chain completeness	Missing intermediates can break some clients

FAQ

Does it show details like the expiry date or certificate chain?: No. This is a basic check based on whether the connection succeeds. For expiry date and chain details, use the SSL Certificate Viewer tool alongside this one.
What does it mean if the check fails?: It could be caused by an expired or mismatched certificate, the server being down, DNS issues, and more. Use the error message to narrow down the cause.
Is the domain I enter stored?: No. It simply attempts a connection immediately for each request.
Expiry is near — now what?: Renew with your CA. Let's Encrypt certs last 90 days, so auto-renewal (certbot) is the norm.
How far does a *.example.com wildcard reach?: One subdomain level: a.example.com works, a.b.example.com does not.