Take an IP and try to look for the domain/host associated with it.
Get approximate IP details.
Get all possible details about an SSL certificate.
Decode URL input to back to a normal string.
Convert a unix timestamp to UTC and your local date.
Generate deep link mailto with subject, body, cc, bcc & get the HTML code as well.
Convert text to binary and the other way for any string input.
Convert text to octal and the other way for any string input.
Easily convert IDN to Punnycode and back.