Easily convert ICO image files to GIF.
Easily convert ICO image files to PNG.
Easily convert ICO image files to JPG.
Easily convert ICO image files to BMP.
Easily convert IDN to Punnycode and back.
Extract email addresses from any kind of text content.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Take an IP and try to look for the domain/host associated with it.
Make sure your passwords are good enough.
Get all possible details about an SSL certificate.