Free SSL Certificate Checker
Enter a domain to inspect its SSL/TLS certificate. You'll see the issuer, validity dates, days until expiry, protocol version, and whether the certificate chain is healthy. Useful for catching expiring certificates before they cause browser warnings.
Without https://
advanced options
Default is 443 (HTTPS)
returns
- data.days_until_expiry
- Days left before the certificate expires.
- data.valid
- True when the cert is current, matches the domain and isn't self-signed.
- data.valid_to
- Expiry date of the certificate, with the start date in valid_from.
- data.issuer
- The certificate authority that signed it.
- data.alt_names
- Every hostname the certificate covers.
- data.validation_issues
- Problems found, like an expired cert or a hostname mismatch.
Run it from your code
A temporary key takes one request and lasts seven days at 20 calls a day. Register and it becomes 75 a day, still free.
$ curl -s "https://apixies.io/api/v1/inspect-ssl?domain=stripe.com" \ -H "X-API-Key: $APIXIES_KEY" | jq '.data.days_until_expiry' 55
questions
What does this SSL checker verify?
It connects to the domain over HTTPS, retrieves the certificate, and checks the issuer, validity period, protocol version, and chain integrity. It does not perform a full vulnerability scan — it focuses on certificate health.
Can I check SSL on a non-standard port?
Yes. The API supports a port parameter, so you can check services running on ports other than 443.
How often should I check my SSL certificates?
At minimum, once a week for production domains. Many teams automate this with the API to get alerts when certificates are within 30 days of expiry.