Generate an MD4 hash for any string input.
Generate an MD5 hash of 32 characters length for any string input.
Validate JSON content and make it looks good.
Get details of any file type, such as the mime type or last edit date.
Get approximate IP details.
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.
Make sure your passwords are good enough.