Tailwind CSS v4.0 Beta 1
About eight months ago we open-sourced our progress on Tailwind CSS v4.0.
Hundreds of hours of fixing bugs, soul-crushing backward compatibility work, and troubleshooting Windows CI failures later, I'm excited to finally tag the first public beta release. As I talked about when we published the first alpha, Tailwind CSS v4.0 is an all-new engine built for performance, and designed for the modern web.
Built for performance — full builds in the new engine are up to 5x faster, and incremental builds are over 100x faster — and measured in microseconds. Unified toolchain — built-in import handling, vendor prefixing, and syntax transforms, with no additional tooling required.
CSS-first configuration — a reimagined developer experience where you customize and extend the framework directly in CSS instead of a JavaScript configuration file. Designed for the modern web — built on native cascade layers, wide-gamut colors, and including first-class support for modern CSS features like container queries, @starting-style, popovers, and more.
There's so much more to say, but everything you need to get started is in the new beta documentation we published today: Get started with Tailwind CSS v4.0 Beta 1 → Start building and help us bullet-proof this thing for the stable release early in the new year.