⚡ CSS Tools in Japan

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

Japan is an East Asian country with a population of around 125 million people.

According to our research, CSS tools are used on 0.7% of websites from Japan.

⭐ Most Popular in 2026

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

The most popular is RTLCSS with a substantial share of 77.7%, followed by PostCSS with 46.7% and Autoprefixer with 39.3%.

RTLCSS 77.7%
PostCSS 46.7%
Autoprefixer 39.3%
Custom Shape Dividers 0.7%
Stylelint 0.5%
PurgeCSS 0.2%
Animista 0.09%

🚀 Highlights

Here is a list of the top tools that are more popular in Japan than worldwide.
Differences between global and country rankings are shown in parentheses.

4. Custom Shape Dividers ^(-1)

✨ Best CSS Tools

Below is a more detailed list of 7 CSS tools used on sites from Japan, 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	77.7%
2	PostCSS A tool for transforming CSS styles with JS plugins. FreeOpen source	46.7%
3	Autoprefixer A PostCSS plugin to parse CSS and add vendor prefixes to CSS rules using values from Can I Use. FreeOpen source	39.3%
4	Custom Shape Dividers An online tool to generate fully responsive CSS dividers.	0.7%
5	Stylelint A linter for CSS and SCSS stylesheets that helps to avoid errors and enforce conventions. FreeOpen source	0.5%
6	PurgeCSS A tool to analyze and remove unused CSS. FreeOpen source	0.2%
7	Animista A CSS animation library of ready-made CSS animations.	0.09%

👉 See Also

✨ Related Technologies
- CSS
🌎 CSS Tools in other countries

Data is based on the analysis of 157,205 websites from Japan.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.