Take an IP and try to look for the domain/host associated with it.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Get all possible details about an SSL certificate.
Ping a website, server or port..
Check if the URL is cached or not by Google.
Check for 301 & 302 redirects of a specific URL. It will check for up to 10 redirects.
Get all the HTTP headers that an URL returns for a typical GET request.
Make sure your passwords are good enough.
Get details of any file type, such as the mime type or last edit date.
Easily convert bytes (B) to yottabytes (YB).