You copy a JavaScript file from a vendor, open it in your editor, and it looks like this: function a ( b , c ){ var d = b * c / ( b + c ); return d . toFixed ( 2 )} function calculateEMI ( principal , rate , months ){ var r = rate / 12 / 100 ; return principal * r * Math . pow ( 1 + r , months ) / ( Math . pow ( 1 + r , months ) - 1 )} Enter fullscreen mode Exit fullscreen mode Two functions. No line breaks. No indentation. And you need to understand what it does. This is where a code beautifier saves you. What a code beautifier does A code beautifier (also called a code formatter or prettifier) takes compressed or poorly structured code and rewrites it with: Proper indentation Line breaks after each statement Consistent spacing around operators and braces Readable block structure It doesn't change logic, rename variables, or fix bugs — it only changes whitespace and formatting. The output runs identically to the input.…