SSL Certificate Checker: An SSL checker inspects a website's SSL/TLS certificate — its issuer, validity dates, domain coverage and expiry — so you can confirm HTTPS is set up correctly. Enter a domain to see when its certificate expires and whether it's valid.
Frequently Asked Questions
What does an SSL checker do?
An SSL checker retrieves a site's TLS certificate and reports who issued it, which domains it covers, and when it expires. This confirms that HTTPS is valid and trusted by browsers.
How do I know if my SSL certificate is expired?
Enter your domain and the checker shows the certificate's 'valid until' date. If that date has passed, browsers will warn visitors that the connection is not secure.
Why does my site show 'not secure'?
This usually means the certificate is expired, self-signed, issued for the wrong domain, or missing entirely. It can also appear if some page resources still load over HTTP.
How often should SSL certificates be renewed?
Most SSL certificates last 90 days to 1 year. Automated issuers like Let's Encrypt renew every 90 days, so it's best to set up auto-renewal to avoid unexpected expiry.