SSL Certificate Checker for Website Security

Check SSL certificate expiry, issuer, subject names, SAN coverage, trust status, and common HTTPS certificate problems for any public domain.

⚡ Fast Results 🔒 Privacy Minded 🇨🇦 Built by SmartersWEB

Check an SSL certificate

Domain to Check

Enter the public domain only. The checker connects to port 443 and validates the certificate chain.

Running tool…

This usually takes only a few seconds.

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Tool Error

📊 Results Ready ▼

Why SSL certificate checks matter

SSL certificates protect visitors, support trust signals, enable secure forms and checkout pages, and are expected by modern browsers. An expired, mismatched, or incomplete certificate can create browser warnings, blocked payments, failed API calls, and lost leads. This SSL Certificate Checker helps confirm whether a public domain has a valid HTTPS certificate and when it expires.

Common SSL checker use cases

Use this tool after launching a website, moving hosting, changing Cloudflare SSL mode, adding a subdomain, renewing a certificate, or troubleshooting browser security warnings. It can help identify expiry dates, issuer details, domain coverage, and whether the certificate appears trusted for the domain being checked.

What to check next

After checking SSL, run the Redirect Checker to confirm HTTP requests upgrade cleanly to HTTPS and the HTTP Headers Inspector to review HSTS and other security headers. For a full technical review, also check DNS records, page size, and website speed because SSL, redirects, headers, and hosting configuration often work together.