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Tailwind CSS

FrameworkTech

Tailwind CSS is an open-source utility-first CSS framework that provides a wide vocabulary of low-level utility classes (`flex`, `pt-4`, `text-center`, `bg-blue-500`…) you compose directly in HTML, rather than writing s…

Tailwind [CSS](/ressources/glossaire-de-la-tech/css) is an open-source utility-first CSS framework that provides a wide vocabulary of low-level utility classes (`flex`, `pt-4`, `text-center`, `bg-blue-500`…) you compose directly in HTML, rather than writing separate stylesheets.

The approach removes the cost of naming and the risk of dead styles; a compiler only emits the classes you actually use, producing very small final CSS. The design system is fully configurable through a `tailwind.config` file.

Tailwind v4, released in 2025, ships its own Rust engine, is configurable directly in CSS and has become the dominant CSS framework for new web projects.

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