SSL certificate check

Enter a domain and see the real state of its certificate: issuer, validity window and how many days are left before it expires. The TLS connection happens live, through the same checker that monitors our customers' assets.

Just the domain. Paste a full URL and we will extract the hostname.

What this check does

  • [ok] Opens a real TLS connection on port 443, right now
  • [ok] Reads the issuer and the name the certificate covers
  • [ok] Computes the days remaining until the expiry date
  • [ok] Confirms the certificate covers the domain you asked about (CN and SANs)
  • [ok] Checks whether HTTP redirects to HTTPS

What it does not do

  • — Does not assess ciphers, TLS versions or OCSP stapling
  • — Does not scan subdomains
  • — Does not keep monitoring — it is a snapshot, not surveillance