React Formatter

Paste compact React or JSX code and format it with proper component tree indentation and consistent spacing.

Last updated: May 29, 2026

Indent:Preserve blank linesFinal newline

Messy or Compact React / JSX Code

3 lines, 544 B

Formatted React Code

import React,{useState,useEffect} from 'react';
function UserCard({userId,onSelect}) {
  const [user,setUser]=useState(null);
  const [loading,setLoading]=useState(true);
  useEffect(()=> {
    fetch('/api/users/'+userId).then(r=>r.json()).then(data=> {
      setUser(data); setLoading(false);
    }
    );
  },
  [userId]);
  if(loading) return <div className="skeleton">Loading...
</div>
;
return(
<div className="card" onClick={()=>onSelect(user)}>
  <img src={user.avatar} alt={user.name}/>
  <div className="info">
    <h2>
      {user.name}
    </h2>
    <p>
      {user.email}
    </p>
  </div>
</div>
);
}
export default UserCard;

29 lines, 638 B

Input: 3 linesOutput: 29 linesSize: 638 B

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is React Formatter?

React Formatter beautifies React component files — functional components, hooks, JSX element trees, and event handlers — so the code structure is easy to read. It uses a JSX-aware formatting engine that distinguishes JSX element syntax from JavaScript comparison operators, indents component children correctly, and keeps inline expressions like {count} and event handlers like onClick={() => fn()} on the same line as their attributes. It is intentionally lightweight and focuses on indentation and line breaks rather than full AST parsing.

How to Use React Formatter

Paste React or JSX source code.

Choose indentation style.

Click Format.

Review the formatted output.

Copy or download the .jsx file.

Common Use Cases

Expanding compact or minified React component code for debugging.
Normalizing indentation when pasting JSX snippets from different sources.
Formatting React examples before adding to documentation or blog posts.
Cleaning up auto-generated React components from scaffolding tools.

Example Input and Output

A compact React component is expanded with JSX tree indentation.

Compact React

function Button({label,onClick}){return(<button className="btn" onClick={onClick}><span>{label}</span></button>);}

Formatted React

function Button({ label, onClick }) {
  return (
    <button className="btn" onClick={onClick}>
      <span>{label}</span>
    </button>
  );
}

Privacy

React code is formatted locally in the browser and is not uploaded.

Frequently Asked Questions

Does this validate React or JSX syntax?

No. It formats text for readability only. Use your IDE or eslint with eslint-plugin-react to check for errors.

Can it format TypeScript React (.tsx) files?

Yes. TypeScript type annotations and generics are preserved as-is. Use the TypeScript Beautifier for pure .ts files without JSX.

Will it reformat hooks like useState?

Hook calls are formatted like regular function calls — they are kept inline unless they contain JSX return values.

Is my code uploaded anywhere?

No. Formatting runs entirely in your browser.

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