Minify your HTML by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
Encode any string input to URL format.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Decode URL input to back to a normal string.
Get approximate IP details.
Get all possible details about a domain name.
Take an IP and try to look for the domain/host associated with it.