⚡ CSS Tools

CSS tools are software applications and libraries for processing

CSS (Cascading Style Sheets), including static code analysis, transformation, cleanup, and more.

According to our research, CSS tools are used on 0.8% of all websites.
54.4% of these sites use only one CSS tool, 27% use two, and 18.6% use three or more at the same time.

Statistics based on 3.8M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading CSS tools in 2026, based on market share.

The most popular is RTLCSS with an impressive share of 58.5%, followed by PostCSS with 56.4% and Autoprefixer with 40.5%.

RTLCSS 58.5%
PostCSS 56.4%
Autoprefixer 40.5%
Stylelint 6.5%
Custom Shape Dividers 1.1%
PurgeCSS 0.6%
Animista 0.5%
CSSLint 0.03%

You can also drill down by country:

🚀 Country Highlights

Here is a list of tools that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

PostCSS is #1 in the United States ^(-1)
Autoprefixer is #2 in Brazil ^(-1)

✨ Best CSS Tools

Below is a more detailed list of 8 CSS tools we track, ranked by their market share.

Rank	Name	Market share
1	RTLCSS Jordan A framework for converting Left-To-Right CSS to Right-To-Left. FreeOpen source	58.5%
2	PostCSS Barcelona, Spain A tool for transforming CSS styles with JS plugins. FreeOpen source	56.4%
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	40.5%
4	Stylelint An open-source CSS linter built on PostCSS that helps developers detect errors and enforce consistent coding conventions in CSS, Sass, and Less stylesheets. FreeOpen source	6.5%
5	Custom Shape Dividers India An online tool to generate fully responsive CSS dividers. Free	1.1%
6	PurgeCSS London, United Kingdom A tool to analyze and remove unused CSS. FreeOpen source	0.6%
7	Animista Croatia A web-based CSS animation tool and library where developers and designers can generate and test custom CSS keyframe animations. Free	0.5%
8	CSSLint United States An open-source code quality tool for static analysis of CSS code. FreeOpen source	0.03%

👉 See Also

✨ Related technologies
- CSS
⚡CSS frameworks
⚡Build tools
CSS

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 3,827,502 websites.
We currently track the presence of 8 CSS tools across the web.
Statistics were last calculated on September 5, 2026.
For more details, see our methodology and disclaimer.