Convert your HEX color format to HEXA format.
Convert your HEX color format to RGB format.
Convert your HEX color format to RGBA format.
Convert your HEX color format to HSV format.
Convert your HEX color format to HSL format.
Convert text to binary and the other way for any string input.
Minify your HTML by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
Encode any string input to Base64.
Minify your CSS by removing all the unnecessary characters.
Make sure your passwords are good enough.