Make sure your passwords are good enough.
Convert text to ascii and the other way for any string input.
Upload a image and extract the data out of it.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Separate text back and forth by new lines, commas, dots...etc.
Decode URL input to back to a normal string.
Get all possible details about a domain name.