Make CSS unreadable for Humas

I started working on the last project with Grunt for compile sass, minify CSS and bundle javascript and compress images.

Is there any task runner or something else which make my css unreadable?

For Example...

From this...

// html
<div class="foo-bar-stylings"></div>

//css
.foo-bar-stylings {
  some: styles;
}

to something like this...

// html
<div class="wd7tg"></div>

//css
.wd7tg {
  some: styles;
}