The Best Free A to Z Online Web Tools Digital Directory, You Will Always Need
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 approximate IP details.
Get all possible details about an SSL certificate.
Ping a website, server or port..
Check if the URL is banned and marked as safe/unsafe by Google.
Make sure your passwords are good enough.