Secure your website and avoid certificate-related outages with Zecurit’s free SSL Certificate Checker. Instantly verify SSL certificate validity, expiry status, issuer details, and key security checks for any public domain.
Issuer
The Zecurit SSL Certificate Checker helps you quickly analyze a website’s SSL certificate and identify common issues that may impact security, trust, and availability.
This tool is designed for fast checks, no login, no installation, and no configuration required.
Certificate validity status (Valid / Expiring Soon / Expired)
Certificate start date (Valid From)
Certificate expiry date (Valid Until)
Days remaining before expiration
Certificate type (e.g., Domain Validation – DV)
Certificate issuer (Certificate Authority)
Common Name (CN)
Organization (O)
Organizational Unit (OU)
Certificate serial number
Signature algorithm (e.g., SHA256-RSA)
The tool automatically performs essential certificate checks, including:
✔ Certificate is currently valid
✔ Certificate is not expired
✔ Expiry threshold warning (30 days)
✔ Strong signature algorithm detection
✔ Common Name matches the domain
✔ Trusted certificate authority check
These checks help quickly identify misconfigurations before they cause browser warnings or service disruptions.
An expired or misconfigured SSL certificate can result in:
Browser security warnings
Website downtime
Loss of user trust
SEO ranking impact
Compliance risks
Regular SSL certificate checks help ensure your website remains secure and accessible.