Minify your HTML by removing all the unnecessary characters.
Minify your CSS by removing all the unnecessary characters.
Convert kilometers per hour (kph) to miles per hour (mph) with ease.
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 a domain name.
Ping a website, server or port..
Get all the HTTP headers that an URL returns for a typical GET request.