DNS Lookup

Take an IP and try to look for the domain/host associated with it.

Get approximate IP details.

Get all possible details about an SSL certificate.

Get all possible details about a domain name.

Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.

Get all the HTTP headers that an URL returns for a typical GET request.

Check if the URL is banned and marked as safe/unsafe by Google.

Easily remove duplicate lines from a text.