Convert text to octal and the other way for any string input.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Check if the URL is banned and marked as safe/unsafe by Google.
Extract email addresses from any kind of text content.
Get all the HTTP headers that an URL returns for a typical GET request.
Ping a website, server or port..