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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 all possible details about an SSL certificate.
Get all possible details about a domain name.
Ping a website, server or port..
Easily download any YouTube video thumbnail in all the available sizes.
Easily convert bits (bit) to megabytes (MB).
Encode any string input to Base64.
Convert text to binary and the other way for any string input.
Decode Base64 input to back to string.
Make sure your passwords are good enough.