Generate an MD4 hash for any string input.
Generate an MD5 hash of 32 characters length for any string input.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Check if the URL is cached or not by Google.
Get approximate IP details.
Take an IP and try to look for the domain/host associated with it.
Get all the HTTP headers that an URL returns for a typical GET request.
Get all possible details about an SSL certificate.