About SSL Checker
The SSL Checker connects to a website on port 443 and reads its SSL certificate details. Enter a domain or URL and click Check SSL to see whether the certificate is valid, its common name, issuer, validity period, and days remaining before expiry.
Use it for a quick certificate check. The result reflects the certificate available when you run the check and is not a full security audit.
How to Use
- Enter a website’s domain or URL in the URL or domain field, such as
example.com. - Click Check SSL.
- Review the certificate’s validity, common name, issuer, start date, expiry date, and remaining time.
- If the certificate is expired or nearing expiry, contact the website administrator or hosting provider.
FAQ
What does the SSL Checker show?
It reports certificate validity, common name, issuer, validity dates, and the time remaining before expiry.
Does the checker connect to a specific port?
Yes. It connects to port 443, the standard port for HTTPS connections.
Can I enter a domain without https://?
Yes. You can enter a domain such as example.com or provide a full website URL.
What does “days remaining” mean?
It indicates how much time is left before the certificate’s listed expiry date, based on the check.
Does a valid certificate guarantee that a website is completely secure?
No. This tool checks certificate information only; it is not a complete website security assessment.