What stops a component from being converted to a Server Component?

Three categories block conversion: client-side hooks (useState, useEffect, useLayoutEffect, useReducer), event handlers matched by the on[A-Z] pattern such as onClick or onChange, and browser APIs like window, document, localStorage, or sessionStorage. If any are found, the verdict is red and each reason is listed so you know what to refactor.

What does the converter actually change in the code?

When a component is convertible, it removes the 'use client' directive and returns the rest of the code unchanged as server-ready output. It does not rewrite your logic — the transformation is intentionally minimal so you can review and trust the result.

Why does it suggest making the component async?

Server Components can be async functions, which lets you await data directly inside the component instead of fetching in a useEffect. When a function component is detected and conversion succeeds, the tool notes that you can add async/await for data fetching, which is the idiomatic server-side pattern.

Can it convert a component that uses event handlers like onClick?

No. Event handlers require client-side interactivity, so a component with onClick, onChange, onSubmit, or similar must remain a Client Component. The analyzer flags this as a blocking reason and returns the original code unchanged rather than producing broken server code.

Is the conversion safe to ship without review?

Treat the output as a starting point. The analysis uses pattern matching, so the output panel notes "review before use." It catches the common client-only signals, but you should still verify the converted component renders correctly on the server, especially if it imports other modules that have their own client dependencies.

How is this different from the Client Component Detector?

The detector explains why a component needs 'use client' and checks a few more signals (such as useRef, useContext, navigator, and custom hooks) without modifying code. This converter focuses on the reverse: confirming a component is safe to move server-side and producing the stripped output when it is. They are complementary and link to each other.

Server Component Converter

Convert React client components to Next.js server components when possible

About this ToolHow it works, benefits & use cases

Moving a component from the client to the server in the Next.js App Router is only safe when it has no client-only behavior — and spotting that by eye is error-prone. Paste a React component here and the converter analyzes it for the patterns that force a Client Component: client-side hooks (useState, useEffect, useLayoutEffect, useReducer), event handlers like onClick or onChange, and browser APIs such as window, document, localStorage, or sessionStorage. If any are present it tells you the component cannot be converted and lists exactly why. If the component is clean, it strips the 'use client' directive, returns the server-ready code, and notes that you can make the component async to fetch data directly. A clear verdict banner (green for convertible, red for not) sits above the output, and built-in client and server examples let you see both outcomes. The analysis happens entirely in your browser.

How to Use

1Paste your React component into the "Component Code" box, or load the "Client example" or "Server example" to try it.
2Click "Analyze & Convert".
3Read the verdict banner: green means it can become a Server Component, red means it needs to stay a Client Component, with the blocking reasons listed.
4If convertible, review the converted output in the "Server Component" panel — the 'use client' directive is removed for you.
5Copy or download the result (ServerComponent.tsx), or hand it off to the Client Component Detector to inspect a different file.

Key Benefits

Detects the exact client-only patterns that block server conversion before you change anything
Strips the 'use client' directive automatically when conversion is safe
Color-coded verdict banner makes the convertible / not-convertible decision obvious
Lists every blocking reason (hooks, event handlers, browser APIs) so you know what to refactor
Suggests making the converted component async for direct data fetching
Built-in client and server examples demonstrate both possible outcomes
Pure in-browser analysis — your component source is never uploaded

Common Use Cases

Auditing a legacy component to see if it can drop 'use client' and shrink the bundle
Deciding which leaf components in a tree can safely move to the server
Refactoring during a Pages-Router to App-Router migration
Confirming a presentational component has no hidden client dependencies
Teaching the boundary between Server and Client Components with real code

Component Code

Paste a client component — the converter will strip client-only patterns.

Server Component

Converted output — review before use.

Run to see the converted server component.

Server vs Client Components

Use Server Components when:

Fetching data from database or API
Accessing backend resources directly
Keeping sensitive information on server
Reducing client-side JavaScript bundle

Use Client Components when:

Using React hooks (useState, useEffect, etc.)
Adding interactivity and event listeners
Using browser-only APIs
Using Context API

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Server Component Converter

How to Use

Key Benefits

Common Use Cases

Server vs Client Components

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Frequently Asked Questions - Server Component Converter