⚡ 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.
64.4% of these sites use only one CSS tool, 20% use two, and 15.7% use three or more at the same time.

Statistics based on 3.5M+ 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 58.2%, followed by PostCSS with 54.1% and Autoprefixer with 34.2%.

RTLCSS 58.2%
PostCSS 54.1%
Autoprefixer 34.2%
Stylelint 2.5%
Custom Shape Dividers 1.1%
PurgeCSS 0.7%
Animista 0.5%
CSSLint 0.05%

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 Brazil ^(-1)
Autoprefixer is #2 in Israel ^(-1)
Custom Shape Dividers is #4 in Italy ^(-1)
PurgeCSS is #4 in Austria ^(-2)
Animista is #5 in the United Kingdom ^(-2)

✨ 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	58.2%
2	PostCSS Barcelona, Spain A tool for transforming CSS styles with JavaScript plugins. FreeOpen source	54.1%
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	34.2%
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	2.5%
5	Custom Shape Dividers An online tool to generate fully responsive CSS dividers.	1.1%
6	PurgeCSS A tool to analyze and remove unused CSS. FreeOpen source	0.7%
7	Animista A CSS animation library of ready-made CSS animations.	0.5%
8	CSSLint An open-source code quality tool for static analysis of CSS code.	0.05%

👉 See Also

✨ Related technologies
- CSS
⚡CSS frameworks
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 3,580,056 websites.
We currently track the presence of 8 CSS tools across the web.
Statistics were last calculated on July 21, 2026.
For more details, see our methodology and disclaimer.