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SSL Certificate Checker
Verify any website's SSL/TLS certificate health, expiry date, issuing authority, and protocol support. Detect expired or invalid certificates that signal phishing or security risks.
How to Use the SSL Certificate Checker
Enter the domain or URL you want to check.
Click Scan — IncogSay checks the SSL certificate in the URL analysis phase.
Review certificate details: validity period, CA, protocol version, and any warnings.
Get recommendations if the certificate is expired, self-signed, or uses weak protocols.
SSL Certificate Checker — Frequently Asked Questions
What is an SSL certificate?
An SSL/TLS certificate is a digital certificate that authenticates a website's identity and enables encrypted HTTPS connections. It's issued by a trusted Certificate Authority (CA).
Why does an expired SSL certificate matter?
An expired certificate means the connection may no longer be encrypted with verified trust. Browsers display security warnings, and phishing sites often have expired or invalid certificates.
What is the difference between DV, OV, and EV certificates?
Domain Validated (DV) only verifies domain ownership. Organization Validated (OV) additionally verifies the organization. Extended Validation (EV) requires the most rigorous identity verification and was historically shown in green browser bars.
What TLS version should I use?
TLS 1.2 is the minimum acceptable standard. TLS 1.3 is recommended for best security and performance. TLS 1.0 and 1.1 are deprecated and should not be used.
Can a phishing site have a valid SSL certificate?
Yes. SSL certificates only verify domain ownership, not the legitimacy of the website's purpose. Phishers can (and do) obtain valid certificates for their phishing domains.