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.
Get approximate IP details.
Take an IP and try to look for the domain/host associated with it.
Get all possible details about a domain name.
Get all possible details about an SSL certificate.
Decode Base64 input to an image.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.