Glossary · Web & App Development
Radix UI
Overview
What Radix UI Is
Radix UI is an open-source library of low-level, unstyled React component primitives, dialogs, dropdown menus, tooltips, tabs, accordions, and more. It provides the behavior and accessibility of each component but ships with no visual styling, leaving the look entirely to you. This 'headless' approach lets teams build a custom design while relying on solid, tested interaction logic underneath.
Why Developers Build on It
Accessible components are hard to get right: focus management, keyboard navigation, screen-reader support, and WAI-ARIA roles all have subtle edge cases. Radix handles that layer correctly so developers do not reinvent it for every project. Because it is unstyled, it never fights your design system, which is why popular toolkits like shadcn/ui are built directly on top of Radix primitives.
How We Use It
In our frontend and Next.js work, Radix UI gives us a dependable foundation for interactive elements that must be accessible out of the box. We style its primitives to match each client's brand, confident the underlying behavior meets accessibility standards. For our in-house team, that means faster delivery and interfaces that work for keyboard and screen-reader users.
Where we use it
Related Zen in Tech services
How our team puts Radix UI to work in real projects.
FAQ
Radix UI — common questions
Is Radix UI free?
Yes. Radix UI is fully open-source and free to use in commercial and personal projects, with no paid tiers for the component primitives.
Radix UI vs shadcn/ui?
They work together, not against each other. Radix UI provides the unstyled, accessible behavior; shadcn/ui is a set of pre-styled components built on top of Radix that you copy into your project. Use Radix directly for full control, or shadcn/ui for a head start.
Does Radix UI include styling?
No, and that is the point. Radix primitives are unstyled, giving you complete control over appearance while handling behavior and accessibility. You add your own CSS, Tailwind, or design tokens on top.
Need Radix UI done right?
Book a free consultation and we’ll map the fastest, most cost-effective path for your project.
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