What tool can analyze my site and report on unused / unneeded CSS?

Question

how can i find in a early way that this css class is being used or not in website ?

like-

style property that i write in my css is being used or not?

Answer 1

So you want to be able to do something like click a CSS class and have it find all pages on your site that use that class? Not aware of any such tool, kekekela's answer of CSS Usage is probably about as close as you'll get--which will let you find what CSS an individual page uses.