Convert text to binary and the other way for any string input.
Convert text to hexadecimal and the other way for any string input.
Convert text to ascii and the other way for any string input.
Convert text to octal and the other way for any string input.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Use the Google translator API to generate text to speech audio.
Get the web-host of a given website.
Get all possible details about a domain name.
Convert your HEX color format to HSL format.
Take an IP and try to look for the domain/host associated with it.