โ Frequently Asked Questions โ SSL Certificate Checker
What does an SSL certificate checker do?
An SSL certificate checker verifies whether a website uses HTTPS, whether the certificate is valid and not expired, and provides details about the certificate's security level. This tool checks if a domain responds to HTTPS requests, verifies the connection is secure, and reports basic security information. For complete certificate inspection (issuer chain, cipher suites, vulnerability scanning), use SSL Labs' free SSL Test at ssllabs.com.
Why should I check my SSL certificate regularly?
SSL certificates expire โ typically after 90 days to 1 year. An expired certificate causes browser warnings that scare away visitors and can tank your SEO rankings. Google requires HTTPS for full indexing. Expired certificates also break e-commerce checkouts and login forms. Regular checking ensures you renew before expiry and catch any configuration issues early.
What is mixed content?
Mixed content occurs when an HTTPS page loads some resources (images, scripts, stylesheets) via HTTP instead of HTTPS. This partial encryption defeats the purpose of HTTPS. Modern browsers block active mixed content (scripts, iframes) entirely and show warnings for passive mixed content (images). Always ensure all resources on your HTTPS site are also loaded via HTTPS.
What is the difference between HTTP and HTTPS?
HTTP (HyperText Transfer Protocol) transmits data in plain text โ anyone on the network can read it. HTTPS adds SSL/TLS encryption, ensuring data between browser and server is encrypted and cannot be read by third parties. HTTPS also authenticates the server (confirms you're talking to the real website, not an impersonator). All websites handling any user data, login, or payments must use HTTPS.