Minify your HTML by removing all the unnecessary characters.
Minify your CSS by removing all the unnecessary characters.
Get all possible details about an SSL certificate.
Get the size of a text in bytes (B), Kilobytes (KB) or Megabytes (MB).
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Use the Google translator API to generate text to speech audio.
Take an IP and try to look for the domain/host associated with it.
Get approximate IP details.