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SECURITY RECON

SSL Certificate Checker. Instant trust & expiration check.

Perform a live TLS handshake on port 443. Check expiration countdowns, verify intermediate certificate chains, and confirm your site is trusted across all web browsers.

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SECURITY KNOWLEDGE

Common Questions About SSL / TLS Certificates

Why do modern SSL certificates only last 90 days?

Modern Certificate Authorities (like Let's Encrypt and Google Trust Services) issue 90-day certificates to limit vulnerability windows in case of key compromise and enforce automated renewal practices.

What causes a "Not Secure" browser warning?

Browsers flag a website when its SSL certificate has expired, does not match the URL entered (mismatch), or is missing an intermediate certificate needed to link back to a trusted root authority.

What is a Wildcard SSL certificate?

A wildcard certificate (e.g. *.yourdomain.com) secures all first-level subdomains (such as api.yourdomain.com, portal.yourdomain.com, and www.yourdomain.com) under a single certificate.