Minify your CSS by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
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.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Decode Base64 input to an image.