Easily convert days to seconds.
Easily convert days to minutes.
Easily convert days to hours.
Easily convert days to months.
Easily convert days to years.
Compress and optimize images for a smaller image size but still high quality.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Extract email addresses from any kind of text content.
Take an IP and try to look for the domain/host associated with it.
Get approximate IP details.
Make sure your passwords are good enough.