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SSL Certificate Checker

Check SSL certificate details — grade, expiry, issuer, SAN domains, PEM and more. Free online SSL checker with API access.

This tool connects to the domain's server to check its SSL certificate. Only the domain you enter is sent — no data is stored.

API Usage (cURL)

curl -X POST https://wivrix.com/api/ssl \
  -H "Content-Type: application/json" \
  -d '{"domain": "example.com", "port": 443}'

How to Use the SSL Checker

  1. Enter a domain name (e.g. example.com).
  2. Leave port at 443 unless you're checking a non-standard HTTPS port.
  3. Click Check SSL to inspect the certificate.

What It Checks

  • Grade — overall SSL quality (A+ to F) based on expiry, algorithm strength, and domain coverage
  • Expiry — days until the certificate expires
  • Issuer — the Certificate Authority (CA)
  • SAN Domains — all domains covered by the certificate
  • Issues — common problems like weak ciphers, expired certs, or missing domain coverage
  • PEM — the raw certificate in PEM format (included in API response)

API Integration

Send a POST request to /api/ssl with domain and optional port. The response includes the grade, issues, full subject/issuer details, validity dates, SAN domains, and the PEM-encoded certificate. Rate limited to 30 requests per minute.

Privacy: Only the domain name you enter is sent to the server. No data is stored.

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