Convert your HEXA color format to HEX format.
Convert your HEXA color format to RGB format.
Convert your HEXA color format to RGBA format.
Convert your HEXA color format to HSV format.
Convert your HEXA color format to HSLA format.
Generate a random number between a given range.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Extract email addresses from any kind of text content.
Make sure your passwords are good enough.
Get all possible details about an SSL certificate.
Take an IP and try to look for the domain/host associated with it.