Website tools
Four small tools that answer the usual questions when a website misbehaves. Each one looks at the site from one of our servers, not from your computer, so you see what the rest of the world sees.
SSL certificate check
Enter a domain to see the certificate its server presents: who issued it, for which host names it is valid and how many days are left before it expires.
DNS lookup
Enter a domain to see its DNS records: the addresses it points to, its mail servers, its name servers and its TXT entries.
HTTP header check
Enter a domain to see the response headers its server sends, and which of the common security headers are present.
Redirect check
Enter a domain to follow it from its plain http address to the page that finally answers, one step at a time.