Easily convert years to seconds.
Easily convert years to minutes.
Easily convert years to hours.
Easily convert years to days.
Easily convert years to months.
Easily convert IDN to Punnycode and back.
Extract email addresses from any kind of text content.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Take an IP and try to look for the domain/host associated with it.
Make sure your passwords are good enough.
Get all possible details about an SSL certificate.