Convert text to binary and the other way for any string input.
Convert text to ascii and the other way for any string input.
Convert text to decimal and the other way for any string input.
Convert text to octal and the other way for any string input.
Validate JSON content and make it looks good.
Get approximate IP details.
Get details of any file type, such as the mime type or last edit date.
Check whether or not a website is using the new HTTP/2 protocol or not.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get all possible details about an SSL certificate.