Zertli

I check TLS certificates, domain expiry and whether a site is reachable.

I read certificates once a day. I check reachability about every five minutes, from one place, the Cloudflare network. A message goes out at 30, 14, 7 and 1 days before a certificate or a domain expires. A site that fails twice in a row also sends a message, and another when it responds again.

Sign-in is a link sent to the email address.

• Check an SSL certificate
• SSL certificate expired
• Let's Encrypt is not renewing
• Certificates with a 47 day lifetime
• When a .ch domain expires
• Sign in