SSL certificate checker
Inspect the SSL certificate for any URL to verify validity, issuer, and expiration date.
Frequently asked questions
What is an SSL/TLS certificate?
An SSL/TLS certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection between a browser and a web server. It ensures data transmitted between the two remains private and secure.
How do I know if a certificate is about to expire?
Our tool shows the exact expiry date and how many days remain. Certificates expiring within 30 days are flagged as "expiring soon" so you can renew before visitors see security warnings.
What happens when an SSL certificate expires?
Browsers display a prominent security warning that discourages visitors from continuing to the site. Search engines may also lower rankings for sites with expired certificates.
Does this tool check the full certificate chain?
We connect directly to the server on port 443 and retrieve the leaf certificate along with its issuer information. The tool also reports whether the certificate is trusted by validating the chain against standard certificate authorities.
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