⚡ CSS Tools in the United States

CSS tools are software applications and libraries for processing CSS (Cascading Style Sheets), including static code analysis, transformation, cleanup, and more.

The United States of America (USA) is a North American country with a population of over 341 million people.

According to our research, CSS tools are used on 0.9% of websites from the United States.

Statistics based on 614K+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the top CSS tools in the United States in 2026, based on market share.

The most popular is RTLCSS with an impressive share of 56.1%, followed by PostCSS with 53.9% and Autoprefixer with 35.2%.

✨ Best CSS Tools

Below is a more detailed list of 8 CSS tools used on sites from the United States, ranked by their market share.

RankNameMarket share
1
RTLCSS
Jordan

A framework for converting Left-To-Right CSS to Right-To-Left.

FreeOpen source
2
PostCSS
Barcelona, Spain

A tool for transforming CSS styles with JS plugins.

FreeOpen source
3
Autoprefixer
Barcelona, Spain

A PostCSS plugin to parse CSS and add vendor prefixes to CSS rules using values from Can I Use.

FreeOpen source
4
Stylelint

An open-source CSS linter built on that helps developers detect errors and enforce consistent coding conventions in CSS, Sass, and Less stylesheets.

FreeOpen source
5
Custom Shape Dividers

An online tool to generate fully responsive CSS dividers.
6
PurgeCSS

A tool to analyze and remove unused CSS.

FreeOpen source
7
Animista

A CSS animation library of ready-made CSS animations.
8
CSSLint

An open-source code quality tool for static analysis of CSS code.

👉 See Also

🗃️ About This Data