Convert your RGB color format to HEXA format.
Convert your RGB color format to RGBA format.
Convert your RGB color format to HSV format.
Convert your RGB color format to HSL format.
Convert your RGB color format to HSLA format.
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.
Make sure your passwords are good enough.
Take an IP and try to look for the domain/host associated with it.
Get all possible details about an SSL certificate.