Minify your HTML by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
Get approximate IP details.
Get all the HTTP headers that an URL returns for a typical GET request.
Ping a website, server or port..
Get all possible details about an SSL certificate.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Use the Google translator API to generate text to speech audio.