Convert text to binary and the other way for any string input.
Convert text to hexadecimal and the other way for any string input.
Convert text to ascii and the other way for any string input.
Convert text to octal and the other way for any string input.
Extract email addresses from any kind of text content.
Free Tool to Check A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get all possible details about a domain name.
Check if the URL is cached or not by Google.
Take an IP and try to look for the domain/host associated with it.