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 approximate IP details.
Get all possible details about an SSL certificate.
Ping a website, server or port..
Convert your text to any kind of text case, such as lowercase, UPPERCASE, camelCase...etc.
Use the Google translator API to generate text to speech audio.
Count the amount of characters and words of a given text.
Get & verify the meta tags of any website.