The instant on-demand Atomic CSS engine.
💡 I highly recommend reading this blog post -
Reimagine Atomic CSS
for the story behind
📚 Documentation | 🧑💻 Interactive Docs | 🤹♂️ Playground
Inspired by Windi CSS, Tailwind CSS, and Twind, but:
- Fully customizable - no core utilities, all functionalities are provided via presets.
- No parsing, no AST, no scanning, it's INSTANT (5x faster than Windi CSS or Tailwind JIT).
- ~6kb min+brotli - zero deps and browser friendly.
- Shortcuts - aliasing utilities, dynamically.
- Attributify mode - group utilities in attributes.
- Pure CSS Icons - use any icon as a single class.
- Variant Groups - shorthand for group utils with common prefixes.
- CSS Directives - reuse utils in CSS with
@applydirective. - Compilation mode - synthesizes multiple classes into one at build time.
- Inspector - inspect and debug interactively.
- CSS-in-JS Runtime build - use UnoCSS with one line of CDN import.
- VS Code extension
- Code-splitting for CSS - ships minimal CSS for MPA.
Read the documentation for more details.
UnoCSS is made possible thanks to the inspirations from the following projects:
in alphabet order
MIT License © 2021-PRESENT Anthony Fu