Tailwind CSS 4.0 is out – what changed?

Oxide engine, CSS-first configuration, and zero-config setup. We migrated a project and documented every breaking change.

Tailwind v4 is rewritten entirely in Rust with an Oxide engine. We show the updated import config, CSS-based customization, and how the compilation speed is 10x faster.

As developers, keeping up with the rapid changes in technologies, libraries, and best practices can be overwhelming. In each issue of TechForDev, we aim to filter out the noise and deliver high-value resources, benchmarks, and summaries straight to your browser.

Below, you can explore the complete, official details of this topic directly from the official developer blogs, repository notes, and documentation portals.