Easily convert days to seconds.
Easily convert days to hours.
Easily convert days to weeks.
Easily convert days to months.
Easily convert days to years.
Get all the HTTP headers that an URL returns for a typical GET request.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get all possible details about an SSL certificate.
Ping a website, server or port..
Get approximate IP details.
Take an IP and try to look for the domain/host associated with it.