Minify your CSS by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
Convert normal text to cursive font type.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Take an IP and try to look for the domain/host associated with it.
Separate text back and forth by new lines, commas, dots...etc.
Extract email addresses from any kind of text content.