shadcn/ui review: copy-paste components that actually hold up

By Gerald · 28 June 2026

Clean user interface components on a screen mockup

Most component libraries ask you to install a package and import pre-built components. shadcn/ui does the opposite. It gives you the source code and tells you to copy it into your project. That sounds like more work, and it is. But after building Flow's entire interface with shadcn/ui components, I understand why the model works.

shadcn/ui is not a component library. It is a collection of accessible, customizable primitives that you own. The tradeoff is more setup and manual updates, but you get full control without dependency lock-in.

What shadcn/ui actually is

shadcn/ui is built on top of Radix UI primitives. Radix provides unstyled, accessible components for dialogs, dropdowns, tabs, and other common patterns. shadcn/ui adds Tailwind CSS styling, sensible defaults, and a copy-paste installation workflow.

When you add a shadcn/ui component to your project, you run a CLI command that copies the component file into your codebase. You then own that file. You can modify it, extend it, or delete it. It is not a dependency. It is your code.

This model is fundamentally different from Material-UI, Chakra UI, or Ant Design. Those libraries ship compiled components through npm. You configure them through props and theme objects. shadcn/ui gives you the raw component and gets out of the way.

What works about the copy-paste model

Component library files in a project directory — shadcn/ui is not a dependency. It is code you own and can change.

Full control without starting from scratch

Building accessible UI from scratch is hard. Focus management, keyboard navigation, ARIA attributes, and screen reader support require expertise most developers do not have. Radix primitives handle the accessibility layer. shadcn/ui adds the styling layer. You get a production-ready component without the research.

But because the code lives in your project, you are not limited by the library's API. If the default dialog needs different animation timing, you change the Framer Motion config in the component file. If the button needs a new variant, you add it to the Tailwind class map. There are no prop walls to climb over.

On Flow, I customized the command palette, the date picker, and the sheet component to match our exact needs. With a traditional library, those changes would require hacky overrides or forked dependencies.

No dependency lock-in

Traditional component libraries create deep dependency trees. They pull in emotion, styled-components, theme providers, and icon sets. Upgrading the library can break your application. Removing it requires rewriting every component that uses it.

shadcn/ui components have minimal dependencies. Most need only Radix primitive packages, Tailwind CSS, and class-variance-authority for variant management. Because the components are your code, you control when and how they change.

If shadcn/ui disappeared tomorrow, Flow would keep working. The components are in our repository. We would lose the CLI for adding new components, but every existing component would continue to function.

Accessibility is built in, not bolted on

Accessibility is often an afterthought in UI libraries. Developers add ARIA labels when reminded, test keyboard navigation when forced, and hope screen readers figure out the rest. Radix primitives invert this. They start with correct ARIA roles, focus trapping, and keyboard behavior. The styling layer does not compromise the accessibility layer.

For Flow, this means our dialogs trap focus correctly. Dropdown menus respond to arrow keys. Tabs manage focus and selection state automatically. I did not write any of that logic. Radix provided it, and shadcn/ui exposed it in a usable form.

The CLI is genuinely useful

The shadcn/ui CLI does more than copy files. It installs the necessary dependencies, updates your Tailwind config, and adds CSS variables for theming. When you run npx shadcn add dialog, you get a working dialog component in seconds.

The CLI also manages the project structure. Components go in a predictable directory. Dependencies are tracked. Updates are suggested when the upstream templates change. It feels like a package manager for components, even though nothing is actually packaged.

The honest limitations

Manual updates are your responsibility

When a traditional library fixes a bug, you bump the version number and redeploy. When shadcn/ui fixes a bug, you must notice the fix, compare the new template to your local copy, and merge the changes manually.

This is not difficult for small fixes, but it scales poorly. If you have twenty shadcn/ui components and upstream changes a shared utility, you may need to update each component file individually. The CLI can help with fresh components, but it does not automatically patch your customized ones.

I have missed accessibility improvements and bug fixes because I did not check for upstream changes regularly. For a production application, you need a process for tracking updates.

No single version to bump

With a library, you know exactly what version you are running. With shadcn/ui, each component was copied at a different time. Your dialog might be from January, your dropdown from March, and your table from last week. There is no package.json entry that tells you the state of your UI layer.

This makes debugging harder. When something behaves strangely, you cannot check the library changelog. You must read the component source and compare it to the current upstream template.

Setup overhead is real

shadcn/ui requires Tailwind CSS, a specific Tailwind configuration, CSS variables for theming, and the class-variance-authority package. The initial setup takes time, and the documentation assumes you are using Next.js or Vite with a specific project structure.

If your project uses a different build tool or CSS approach, adapting shadcn/ui is possible but not trivial. You may end up rewriting the styling layer to fit your stack.

The component count is smaller than major libraries

shadcn/ui covers the common patterns: buttons, inputs, dialogs, tables, calendars, and navigation. It does not have the breadth of Material-UI or Ant Design. Complex data grids, rich text editors, and advanced charts are outside its scope.

For Flow, this was not a problem. We needed standard UI patterns, and shadcn/ui provided them. If your application needs extensive specialized components, you will still need additional libraries or custom builds.

Who should use shadcn/ui

Use shadcn/ui if you want accessible, customizable components and you are comfortable owning the code. It suits teams that value control over convenience and prefer Tailwind CSS for styling.

It is particularly good for design systems. Because you own the component source, you can evolve the design system without fighting a third-party API. The components become a foundation rather than a constraint.

Who should skip it

Skip shadcn/ui if you want zero maintenance overhead. Traditional libraries handle updates, theming, and consistency for you. The tradeoff is less control, but the time savings are real.

Skip it if you do not use Tailwind CSS. The styling layer is tightly coupled to Tailwind utilities. Adapting it to another CSS approach requires rewriting most of the component code.

Skip it if you need a large library of specialized components out of the box. shadcn/ui covers the basics well. It does not replace a full component suite.

How Flow uses shadcn/ui

Flow's interface is built almost entirely from shadcn/ui components. The sidebar, command palette, dialogs, forms, dropdown menus, and toast notifications all started as shadcn/ui templates. We customized colors, spacing, and animation to match the Flow brand.

The setup took about an hour. The CLI installed the base configuration, and adding each component was a single command. Within a day, we had a consistent, accessible UI layer that felt native to the product.

The only component we replaced entirely was the rich text editor. shadcn/ui does not provide one, and our note-taking feature needed block-based editing. We built that on TipTap while keeping the surrounding UI chrome from shadcn/ui.

Frequently asked questions

What is shadcn/ui? shadcn/ui is a collection of reusable components built on Radix UI primitives and styled with Tailwind CSS. Unlike traditional libraries, it is distributed as copy-paste code rather than an npm package. You add components to your project through a CLI, then own and modify the source.

Is shadcn/ui a component library? No. It is a set of component templates. There is no central package to install and import. Each component becomes part of your codebase after you run the installation command. This distinction matters because it affects how you update, customize, and maintain the components.

How do I update shadcn/ui components? Updates are manual. You compare your local component files to the current upstream templates and merge changes as needed. The CLI can reinstall fresh components, but it will overwrite your customizations. For production projects, track upstream changes and apply fixes selectively.

Does shadcn/ui work without Tailwind CSS? Technically yes, but practically no. The component templates are written with Tailwind utility classes. Using them without Tailwind requires rewriting the styling layer. If you use a different CSS approach, shadcn/ui is probably not the right choice.

Is shadcn/ui free? Yes. All components are open source and free to use. The CLI and templates are publicly available. You pay with setup time and maintenance effort rather than money.

My verdict

shadcn/ui is the best way to build accessible, customizable React interfaces today. The copy-paste model asks more of you than traditional libraries, but it gives you ownership in return. Start with it if you use Tailwind CSS and want components you can modify without fighting an API. Skip it if you prefer zero-maintenance imports or if your stack does not include Tailwind.