Web Tools

🔒 SSL Checker

Verify SSL certificate validity, expiry date, issuer and domain match for any website.

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About the SSL Checker

This free online tool connects directly to the server and reads the SSL/TLS certificate using PHP's OpenSSL extension — no third-party services involved.

  • Validity — confirms the certificate is currently within its valid date range.
  • Expiry countdown — shows exactly how many days remain before the certificate expires.
  • Domain match — verifies that the certificate was issued for the domain you entered (including wildcard certificates).
  • Issuer — identifies the Certificate Authority (CA) that issued the certificate (e.g. Let's Encrypt, DigiCert, Sectigo).
  • SANs — lists all Subject Alternative Names covered by the certificate.
  • Key & algorithm — shows the encryption key type (RSA/ECDSA), size and signature algorithm.