Convert your RGBA color format to HEXA format.
Convert your RGBA color format to RGB format.
Convert your RGBA color format to HSV format.
Convert your RGBA color format to HSL format.
Convert your RGBA color format to HSLA format.
Validate JSON content and make it looks good.
Get approximate IP details.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get all possible details about an SSL certificate.
Ping a website, server or port..
Take an IP and try to look for the domain/host associated with it.