What is Tailwind CSS v4 — Utility-First CSS Framework?

The most popular utility-first CSS framework, now with v4 engine rewritten in Rust. 10x faster builds, automatic content detection, and zero-config setup. 90,000+ GitHub stars.

Is Tailwind CSS v4 — Utility-First CSS Framework free to use?

Yes. Tailwind CSS v4 — Utility-First CSS Framework is freely available on TokRepo. Check the Source & Thanks section on the asset page for the specific open-source license.

How do I install Tailwind CSS v4 — Utility-First CSS Framework?

Visit the asset page on TokRepo and click "Copy for agent" to get the installation instructions. Most assets can be installed with a single command.

Tailwind CSS v4 — Utility-First CSS Framework

<div class="flex items-center gap-4 p-6 bg-white rounded-xl shadow-lg"> <img class="w-12 h-12 rounded-full" src="avatar.jpg" alt="User"> <div> <h3 class="text-lg font-semibold text-gray-900">Alice Johnson</h3> <p class="text-sm text-gray-500">Software Engineer</p> </div> </div>

What Changed in v4

Feature	v3	v4
Config	`tailwind.config.js`	CSS-first `@theme`
Content detection	Manual `content: [...]`	Automatic
Build speed	Fast	10x faster (Rust)
Custom values	Config file	`text-[14px]` inline
Dark mode	`darkMode: 'class'`	Automatic

Zero-Config Setup

/* Just import — no config file needed */
@import "tailwindcss";

Tailwind v4 automatically finds and scans your template files.

CSS-First Configuration

@import "tailwindcss";

@theme {
  --color-brand: #3b82f6;
  --font-display: "Inter", sans-serif;
  --breakpoint-3xl: 1920px;
}

Common Patterns

Card:

<div class="rounded-2xl bg-white p-6 shadow-md dark:bg-gray-800">
  <h2 class="text-xl font-bold">Title</h2>
  <p class="mt-2 text-gray-600 dark:text-gray-300">Description</p>
</div>

Responsive Grid:

<div class="grid grid-cols-1 gap-4 md:grid-cols-2 lg:grid-cols-3">
  <!-- cards -->
</div>

Flex Layout:

<div class="flex items-center justify-between">
  <span>Left</span>
  <span>Right</span>
</div>

AI-Native

Tailwind is the default styling output for AI tools:

v0.dev generates Tailwind + shadcn/ui
Cursor writes Tailwind when asked for styling
Claude Code uses Tailwind in web projects
Bolt.new defaults to Tailwind

Key Stats

90,000+ GitHub stars
v4 engine rewritten in Rust
10x faster builds
Zero-config automatic detection
AI tools' default CSS framework

FAQ

Q: What is Tailwind CSS? A: A utility-first CSS framework where you style elements with classes like flex, p-4, text-lg instead of writing custom CSS. Version 4 is 10x faster with zero config.

Q: Is Tailwind free? A: Yes, fully open-source under MIT license.

Q: Do I still need tailwind.config.js in v4? A: No, v4 uses CSS-first configuration with @theme and automatic content detection. Config files are optional.