10 Best JavaScript CSS Processor Libraries

List hand-picked by Openbase Experts
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sass

The reference implementation of Sass, written in Dart.

10.2M
3.4K
Built-in
MIT
autoprefixer

Parse CSS and add vendor prefixes to rules by Can I Use

18.9M
20.6K
Built-in
MIT
sass-loader

Compiles Sass to CSS

12.3M
3.8K
DefinitelyTyped
MIT
purgecss

Remove unused CSS

1M
7.1K
Built-in
MIT
node-sass

🌈 Node.js bindings to libsass

2.9M
8.3K
DefinitelyTyped
MIT
stylus

Expressive, robust, feature-rich CSS language built for nodejs

3.3M
10.9K
DefinitelyTyped
MIT
gulp-purgecss

Remove unused CSS

7K
7.1K
Built-in
MIT
gpp

Gatsby plugin for purgecss. Removes unused css/sass/less/stylus. Supports tailwind, bootstrap, bulma etc.

20.6K
75
No support
MIT
less

Less. The dynamic stylesheet language.

4.7M
16.9K
DefinitelyTyped
Apache-2.0
gs

SASS plugin for gulp

425K
1.6K
DefinitelyTyped
MIT
mini-css-extract-plugin

Lightweight CSS extraction plugin

12.5M
4.6K
Built-in
MIT
postcss-nested

PostCSS plugin to unwrap nested rules like how Sass does it.

5M
1K
Built-in
MIT
oca

A Webpack plugin to optimize \ minimize CSS assets.

3.6M
1.1K
DefinitelyTyped
MIT
rework

Plugin framework for CSS preprocessing in Node.js

2.3M
2.8K
No support
rpp

Seamless integration between Rollup and PostCSS.

731K
627
Built-in
MIT
ga

Prefix CSS

248K
690
DefinitelyTyped
MIT
rps

Rollup and compile multiple .scss, .sass and .css imports

56.7K
115
No support
MIT
np

nextjs + purgecss for smaller css bundles

3.8K
129
No support
MIT
css-purge

A CSS tool written in Node JS as a command line app or library for the purging, burning, reducing, shortening, compressing, cleaning, trimming and formatting of duplicate, extra, excess or bloated CSS.

2.3K
117
No support
MIT
noc

Reduce all CSS classes produced by CSS modules to the smallest form possible

929
26
Built-in
MIT
myth

A CSS preprocessor that acts like a polyfill for future versions of the spec.

324
4.4K
No support
MIT
css

CSS preprocessor. Written in PHP

15
537
No support
MIT
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