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.

Ping a website, server or port.

Check if the URL is banned and marked as safe/unsafe by Google.

Get details of any file type, such as the mime type or last edit date.

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