Minify your HTML by removing all the unnecessary characters.
Minify your CSS by removing all the unnecessary characters.
Get the gravatar.com globally recognized avatar for any email.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Crop images to a specific size.
Get approximate IP details.
Make sure your passwords are good enough.
Get all possible details about a domain name.