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What is UnoCSS?

It is the instant atomic CSS engine with maximum performance and flexibility. There are no core utilities - all the functionalities are provided via presets or inline configurations.
UnoCSS is a tool in the CSS Pre-processors / Extensions category of a tech stack.
UnoCSS is an open source tool with 5.3K GitHub stars and 227 GitHub forks. Here’s a link to UnoCSS's open source repository on GitHub

Who uses UnoCSS?

UnoCSS's Features

  • Fully customizable
  • No parsing, no AST, no scanning, it's INSTANT (200x faster than Windi CSS or Tailwind JIT)
  • Approximately 3.5kb min+gzip - zero deps and browser friendly
  • Shortcuts
  • Pure CSS icons
  • Code-splitting for CSS - ships minimal CSS for MPA

UnoCSS Alternatives & Comparisons

What are some alternatives to UnoCSS?
Sass
Sass is an extension of CSS3, adding nested rules, variables, mixins, selector inheritance, and more. It's translated to well-formatted, standard CSS using the command line tool or a web-framework plugin.
Animate.css
It is a bunch of cool, fun, and cross-browser animations for you to use in your projects. Great for emphasis, home pages, sliders, and general just-add-water-awesomeness.
Less
Less is a CSS pre-processor, meaning that it extends the CSS language, adding features that allow variables, mixins, functions and many other techniques that allow you to make CSS that is more maintainable, themable and extendable.
PostCSS
PostCSS is a tool for transforming CSS with JS plugins. These plugins can support variables and mixins, transpile future CSS syntax, inline images, and more.
Stylus
Stylus is a revolutionary new language, providing an efficient, dynamic, and expressive way to generate CSS. Supporting both an indented syntax and regular CSS style.
See all alternatives
Related Comparisons
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UnoCSS's Followers
6 developers follow UnoCSS to keep up with related blogs and decisions.