Less vs SCSS Comparison

Less vs SCSS

Both are CSS preprocessors with similar features. The main differences are syntax and ecosystem.

Syntax Differences

Feature	Less	SCSS
Variables	@color	$color
Mixin call	.mixin()	@include mixin()
Compiler	JavaScript	Dart Sass
Logic (loops/if)	Limited	Powerful
Popularity	Lower	Higher

Same Mixin, Both Syntaxes

// Less
.rounded(@r: 5px) { border-radius: @r; }
.box { .rounded(10px); }

// SCSS
@mixin rounded($r: 5px) { border-radius: $r; }
.box { @include rounded(10px); }

Which to Choose?

Choose SCSS for new projects — bigger community, more features, better tooling. Use Less if maintaining older code (e.g. Bootstrap 3).

FAQs

Can I migrate Less to SCSS?

Yes — they're similar; mostly swap @ for $ and adjust mixins. More in our Less guides.

Which compiles faster?

Modern Dart Sass is very fast; both are fine for most projects.