Whois Lookup

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.

Make sure your passwords are good enough.

Get the gravatar.com globally recognized avatar for any email.

Generate deep link mailto with subject, body, cc, bcc & get the HTML code as well.

Minify your CSS by removing all the unnecessary characters.