Headless UI
Completely unstyled, accessible UI components for React and Vue from Tailwind Labs. Headless UI provides behavioral and accessibility logic for complex interactive components: Combobox, Dialog, Disclosure, Listbox, Menu, Popover, RadioGroup, Switch, Tab, and Transition. Designed to pair with Tailwind CSS for styling. Lighter than Radix UI (fewer components) but maintained by the Tailwind team and deeply integrated with Tailwind patterns.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Local library — no network access. Tailwind Labs-maintained with strong security practices. MIT licensed.
⚡ Reliability
Best When
You're using Tailwind CSS and want accessible interactive components without bringing in a full component library — Headless UI is the official Tailwind Labs solution.
Avoid When
You need a broader component set, use a different styling approach, or use a non-React/Vue framework.
Use Cases
- • Build accessible dropdown menus and comboboxes with correct ARIA roles and keyboard navigation using Headless UI + Tailwind CSS styling
- • Implement accessible modal dialogs and disclosure panels using Headless UI Dialog and Disclosure components
- • Create accessible tab interfaces, radio groups, and toggle switches using Headless UI's components that handle all accessibility requirements
- • Use as the accessible component foundation in Tailwind CSS projects where Radix UI's broader component set isn't needed
- • Build accessible form controls (listbox as select replacement, combobox as autocomplete) with proper keyboard and screen reader support
Not For
- • Non-Tailwind projects — while technically usable without Tailwind, Headless UI is designed for Tailwind CSS styling workflows
- • Projects needing 50+ accessible component types — Radix UI has broader coverage with more primitives
- • Non-React/Vue frameworks — Headless UI supports only React and Vue
Interface
Authentication
Local library — no authentication.
Pricing
Headless UI is MIT open source from Tailwind Labs. Free for personal and commercial use.
Agent Metadata
Known Gotchas
- ⚠ Headless UI 2.x for React requires React 18+ — projects on React 17 must use Headless UI 1.x which has a different API
- ⚠ Headless UI uses a render prop pattern and compound components — Dialog.Panel, Dialog.Title must be inside Dialog; structure matters for ARIA relationships
- ⚠ Transition component wraps elements to animate enter/leave — it must receive exactly one child element; wrapping multiple elements requires an additional container div
- ⚠ Combobox requires controlled state (value + onChange) — unlike native select, Combobox doesn't manage its own selected value state internally
- ⚠ Headless UI components don't include any CSS — they render invisible by default without Tailwind or custom CSS classes applied to each component's render prop
- ⚠ Popover in Headless UI 2.x changed its API from floating placement to using @floating-ui/react internally — custom positioning requires Popover's new floating configuration
Alternatives
Full Evaluation Report
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Package Brief
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Scores are editorial opinions as of 2026-03-07.