Best Open-Source Styling Tools in 2026

Styling tools in this directory cover CSS-in-JS, Tailwind helpers, and UI polish. Emotion composes styles in JavaScript; Twin.macro combines Tailwind with Emotion, Styled-Components, and similar libraries at build time; Feather provides open-source icons. Awesome TailwindCSS collects plugins and resources, and TippyJS React wraps Tippy.js tooltips.

The most popular open-source Styling tool by GitHub stars is Material UI(98.1k stars), followed by Tailwind CSS(94.5k stars)and Prettier(51.8k stars). This page lists the top 30 of 42 styling tools in the directory, ranked by community adoption.

Quick comparison

Best open-source Styling tools in 2026, ranked by GitHub stars
#ToolStarsLanguageLicense
1Material UI

Material UI is a comprehensive React component library that implements Google's Material Design, providing developers with free, modern, and customizable UI elements for building responsive web applications.

98.1kJavaScriptMIT License
2Tailwind CSS

Tailwind CSS is a popular utility-first CSS framework that enables rapid and customizable user interface development through low-level utility classes.

94.5kTypeScriptMIT License
3Prettier

Prettier is an opinionated code formatter that enforces a consistent style by parsing your code and re-printing it with its own rules.

51.8kJavaScriptMIT License
4Daisyui

A popular, free, and open-source Tailwind CSS component library offering a wide range of components for rapid UI development.

40.7kSvelteMIT License
5Mantine

A fully featured React components library with built-in accessibility and design features for building modern web applications.

31.0kTypeScriptMIT License
6Feather

Simply beautiful open-source icons for fast and scalable web design.

25.9kJavaScriptMIT License
7Fluent UI

Fluent UI is a comprehensive collection of customizable React and web components, utilities, and styling frameworks designed to help you build consistent, high-quality web applications aligned with Microsoft's Fluent Design System.

19.9kTypeScriptOther
8Unocss

The instant on-demand atomic CSS engine for ultra-fast development and styling.

18.7kTypeScriptMIT License
9Emotion

๐Ÿ‘ฉโ€๐ŸŽค CSS-in-JS library designed for high performance style composition, offering powerful and flexible style manipulation capabilities.

18.0kJavaScriptMIT License
10Awesome TailwindCSS

A curated list of awesome things related to Tailwind CSS, including plugins, tools, resources, and more.

15.0kโ€”Creative Commons Zero v1.0 Universal

All 30 Styling tools

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Frequently asked questions

What is the best open-source styling tool in 2026?

Material UI leads by GitHub stars(98.1k). Material UI is a comprehensive React component library that implements Google's Material Design, providing developers with free, modern, and customizable UI elements for building responsive web applications.

Are these styling tools free?

Yes. Every tool on this list is open source and free to use in your own projects. Many can be self-hosted.

How is this list ranked?

Tools are ranked by GitHub star count, a strong proxy for community adoption and active maintenance. Star counts are refreshed regularly.

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