Convert your RGB color format to HEX 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.
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.