Tailwind CSS v4.0.0 — Release Notes & Engineering Impact

[](https://tailwindcss.com/blog/tailwindcss-v4) Holy shit it's actually done — we just tagged Tailwind CSS v4.0. Tailwind CSS v4.0 is an all-new version of the framework optimized for performance and flexibility, with a reimagined configuration and customization experience, and taking full advantage of the latest advancements the web platform has to offer. - [New high-performance engine](https://tailwindcss.com/blog/tailwindcss-v4#new-high-performance-engine) — where full builds are up to 5x faster, and incremental builds are over 100x faster — and measured in microseconds. - [Designed for the modern web](https://tailwindcss.com/blog/tailwindcss-v4#designed-for-the-modern-web) — built on cutting-edge CSS features like cascade layers, registered custom properties with `@property`, and `color-mix()`. - [Simplified installation](https://tailwindcss.com/blog/tailwindcss-v4#simplified-installation) — fewer dependencies, zero configuration, and just a single line of code in your CSS file. - [First-party Vite plugin](https://tailwindcss.com/blog/tailwindcss-v4#first-party-vite-plugin) — tight integration for maximum performance and minimum configuration. - [Automatic content detection](https://tailwindcss.com/blog/tailwindcss-v4#automatic-content-detection) — all of your template files are discovered automatically, with no configuration required. - [Built-in import support](https://tailwindcss.com/blog/tailwindcss-v4#built-in-import-support) — no additional tooling necessary to bundle multiple CSS files. - [CSS-first configuration](https://tailwindcss.com/blog/tailwindcss-v4#css-first-configuration) — a reimagined developer experience where you customize and extend the framework directly in CSS instead of a JavaScript configuration file. - [CSS theme variables](https://tailwindcss.com/blog/tailwindcss-v4#css-theme-variables) — all of your design tokens exposed as native CSS variables so you can access them anywhere. - [Dynamic utility values and variants](https://tailwindcss.com/blog/tailwindcss-v4#dynamic-utility-values-and-variants) — stop guessing what values exist in your spacing scale, or extending your configuration for things like basic data attributes. - [Modernized P3 color palette](https://tailwindcss.com/blog/tailwindcss-v4#modernized-p3-color-palette) — a redesigned, more vivid color palette that takes full advantage of modern display technology. - [Container queries](https://tailwindcss.com/blog/tailwindcss-v4#container-queries) — first-class APIs for styling elements based on their container size, no plugins required. - [New 3D transform utilities](https://tailwindcss.com/blog/tailwindcss-v4#new-3d-transform-utilities) — transform elements in 3D space directly in your HTML. - [Expanded gradient APIs](https://tailwindcss.com/blog/tailwindcss-v4#expanded-gradient-apis) — radial and conic gradients, interpolation modes, and more. - [@starting-style support](https://tailwindcss.com/blog/tailwindcss-v4#starting-style-support) — a new variant you can use to create enter and exit transitions, without the need for JavaScript. - [not-* variant](https://tailwindcss.com/blog/tailwindcss-v4#not-variant) — style an element only when it doesn't match another variant, custom selector, or media or feature query. - [Even more new utilities and variants](https://tailwindcss.com/blog/tailwindcss-v4#even-more-new-utilities-and-variants) — including support for `color-scheme`, `field-sizing`, complex shadows, `inert`, and more. Start using Tailwind CSS v4.0 today by [installing it in a new project](https://tailwindcss.com/docs/installation/), or playing with it directly in the browser on [Tailwind Play](https://play.tailwindcss.com/). For existing projects, we've published a comprehensive [upgrade guide](https://tailwindcss.com/docs/upgrade-guide) and built an [automated upgrade tool](https://tailwindcss.com/docs/upgrade-guide#using-the-upgrade-tool) to get you on the latest version as quickly and painlessly as possible. For a deep-dive into everything that's new, [check out the announcement post](https://tailwindcss.com/blog/tailwindcss-v4).