What is the difference between format and minify?
Formatting expands code into indented lines for readability; minifying strips whitespace and comments to reduce size.
Will it change what my code does?
Only whitespace, line breaks and comments are touched. With JavaScript that relies on automatic semicolon insertion, test the minified output before shipping.
Is my code uploaded?
Formatting and minifying run client-side. Nothing is written to server logs.