HTML to JSX Converter

What is HTML to JSX Converter?

An HTML to JSX Converter is a free online tool that transforms standard HTML code into React JSX (JavaScript XML) syntax. JSX is a syntax extension for JavaScript that allows you to write HTML-like code within your React components. While JSX looks very similar to HTML, there are several critical syntax differences that can cause errors if you simply paste HTML directly into a React component. This converter automatically handles all of these differences — converting class to className, for to htmlFor, converting inline event handlers to camelCase (onclick → onClick), and properly self-closing void elements like <img> and <br>.

Whether you are migrating an existing HTML template to a React application, converting static website pages to React components, or learning how JSX differs from HTML, this tool saves time and prevents syntax errors by automating the conversion process. Simply paste your HTML and get clean, ready-to-use JSX output.

HTML vs JSX: Key Differences

How to Use HTML to JSX Converter

1. Paste HTML — Enter your HTML code in the input textarea. You can paste a full HTML document, a partial template, or individual HTML elements
2. Convert — Click the "Convert to JSX" button to transform the HTML
3. Review — The converted JSX output appears in the result textarea, ready for use in React components
4. Copy — Click "Copy JSX" to copy the output to your clipboard
5. Use — Paste the JSX into your React component's render method or functional component return statement

Key Features

• Automatic className Conversion — All class attributes are converted to className automatically
• htmlFor Conversion — Label for attributes become htmlFor
• camelCase Event Handlers — All inline event handlers are converted to camelCase (onclick → onClick, onchange → onChange, onkeydown → onKeyDown, etc.)
• Self-Closing Tag Normalization — Void elements like <img>, <br>, <hr>, <input> get proper self-closing slashes
• Instant Conversion — Results appear immediately with no server round-trips
• Privacy-First — All processing happens in your browser. Your HTML never leaves your device

Use Cases for HTML to JSX Conversion

• HTML Template Migration — Convert existing HTML templates and landing pages into React components without manual rewriting
• Static Site to React — When migrating a static HTML website to a React-based framework (Next.js, Gatsby, Create React App)
• Email Template Integration — Convert HTML email templates for use in React-based email rendering systems
• Third-Party Widget Integration — Convert HTML widget code from third-party services into JSX for React integration
• Learning React — Take familiar HTML and see how it translates to JSX to understand the differences between HTML and React
• Rapid Prototyping — Design in HTML first (using your preferred tools), then convert to JSX for React implementation

Common JSX Gotchas to Watch For

• Multiple root elements — JSX requires a single root element. Wrap multiple sibling elements in a <div>, <React.Fragment>, or <></> (fragment shorthand)
• JavaScript expressions — Use curly braces {} to embed JavaScript expressions in JSX (e.g., <h1>{title}</h1>)
• Conditional rendering — Use ternary operators or logical AND: {isLoggedIn ? <Logout /> : <Login />}
• Lists and keys — When rendering arrays, each element needs a unique key prop: {items.map(item => <li key={item.id}>{item.name}</li>)}
• Boolean attributes — In JSX, boolean attributes like disabled, readOnly, and checked can be written as just the attribute name when true, or omitted when false

Before and After Example

HTML Input

<div class="user-card">
    <img src="avatar.jpg" class="avatar" alt="User avatar">
    <h2 class="user-name">John Doe</h2>
    <p class="user-bio">Software developer</p>
    <button class="btn-primary" onclick="handleClick()">Follow</button>
    <label for="email">Email:</label>
    <input type="email" id="email">
</div>

JSX Output

<div className="user-card">
    <img src="avatar.jpg" className="avatar" alt="User avatar" />
    <h2 className="user-name">John Doe</h2>
    <p className="user-bio">Software developer</p>
    <button className="btn-primary" onClick={handleClick}>Follow</button>
    <label htmlFor="email">Email:</label>
    <input type="email" id="email" />
</div>

Frequently Asked Questions

What is the difference between HTML and JSX?

JSX is a JavaScript syntax extension that looks like HTML but compiles to JavaScript function calls. The key differences are: class becomes className (because "class" is a reserved word in JavaScript), for becomes htmlFor, event handlers use camelCase (onClick instead of onclick), void elements need self-closing slashes, and inline styles are written as JavaScript objects.

Can I convert HTML with inline CSS styles?

This converter focuses on attribute transformations (className, htmlFor, event handlers). Inline styles in HTML use the style attribute with CSS strings. In JSX, the style attribute accepts a JavaScript object with camelCased property names. You will need to manually convert style="color: red; font-size: 14px" to style={{color: 'red', fontSize: '14px'}}.

Does the converter handle custom data attributes?

Yes, custom data-* attributes work identically in HTML and JSX. They pass through the converter unchanged. In React, you can access them via dataset property or use them as regular attributes.

Can I use this converter for React Native?

No. React Native uses a different set of components (<View>, <Text>, <Image>) instead of HTML elements. This converter is specifically for converting HTML to React JSX for web applications. For React Native, you would need a completely different conversion approach.

Why does JSX use className instead of class?

In JavaScript, class is a reserved keyword used for declaring ES6 classes. Since JSX is JavaScript, using class as an attribute name would cause syntax conflicts. React adopted className as the equivalent attribute, which also matches the DOM API property name (element.className).