Take an IP and try to look for the domain/host associated with it.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Get all possible details about an SSL certificate.
Ping a website, server or port..
Easily convert PNG image files to JPG.
Convert your HSL color format to HEX format.
Easily convert megabits (Mbit) to zebibits (Zibit).
Make sure your passwords are good enough.
Reverse a list of given text lines.