⚛ HTML to JSX Converter

What is HTML to JSX Conversion?

JSX is the syntax extension used by React to describe user interfaces. While it looks similar to HTML, JSX has several important differences that make raw HTML invalid inside a React component. Attributes like class must become className, for must become htmlFor, and inline styles must be expressed as JavaScript objects rather than CSS strings. Void elements like <br>, <img>, and <input> must be self-closed with a trailing slash. Event handlers use camelCase naming instead of lowercase, so onclick becomes onClick. These differences mean that copying HTML from a website, template, or design tool directly into a React component will produce errors.

This converter automates the entire translation process. Paste any HTML snippet and get back valid JSX that is ready to drop into your React component. The tool handles dozens of attribute conversions, parses inline style strings into JavaScript object syntax with camelCased property names, converts HTML comments to JSX comment syntax, and ensures all void elements are properly self-closed. It supports both JavaScript and TypeScript workflows, and runs entirely in your browser with zero external dependencies.

Whether you are migrating a legacy HTML template to React, integrating third-party HTML widgets, or converting design mockups from tools that export raw HTML, this tool saves you from tedious manual editing. It handles edge cases like nested quotes in style values, multi-property style declarations, and mixed-case attribute names, producing clean output that passes JSX validation without manual fixes.

How to Use This Tool

1. Paste your HTML into the Input text area on the left side. The tool will automatically convert it as you type or paste.
2. Optionally enable TypeScript mode to add type annotation hints in comments, or toggle the Preserve Comments option to control whether HTML comments are converted to JSX comments or removed entirely.
3. Click "Convert" to process the input, or simply type and watch the output update in real time. The result appears in the JSX Output panel on the right.
4. Click "Copy Output" to copy the JSX to your clipboard, "Sample HTML" to load an example, or "Clear" to reset both panels.

Key Features

• Attribute Conversion - Automatically renames HTML attributes to their JSX equivalents: class to className, for to htmlFor, tabindex to tabIndex, and many more.
• Inline Style Parsing - Converts CSS style strings like style="color: red; font-size: 14px" into JSX style objects like style={{color: 'red', fontSize: '14px'}} with camelCased property names.
• Self-Closing Void Elements - Converts unclosed void elements (<br>, <hr>, <img>, <input>) into self-closing JSX tags with a trailing slash.
• Event Handler CamelCase - Converts lowercase event attributes like onclick, onchange, and onsubmit to React-style camelCase: onClick, onChange, onSubmit.
• Comment Conversion - Translates HTML comments (<!-- text -->) to JSX comment syntax ({/* text */}), with an option to strip them entirely.
• TypeScript Mode - Toggle TypeScript mode to add type annotation hints as comments in the output, helping you integrate the JSX into .tsx files.
• Auto-Convert - Output updates automatically as you type or paste, with a dedicated Convert button for manual control.

Frequently Asked Questions

What is the difference between HTML and JSX?

HTML is the standard markup language for web pages, while JSX is a syntax extension for JavaScript used by React. JSX looks like HTML but follows JavaScript rules: attributes use camelCase naming (className instead of class), inline styles are JavaScript objects instead of CSS strings, all tags must be closed (including void elements like <br />), and comments use JavaScript syntax wrapped in curly braces. JSX is compiled to regular JavaScript function calls by tools like Babel or the TypeScript compiler.

Why does React use className instead of class?

In JavaScript, class is a reserved keyword used for defining classes. Since JSX is embedded in JavaScript, using class as an attribute name would conflict with the language syntax. React chose className as the replacement because it maps directly to the DOM property element.className. Similarly, for is replaced with htmlFor because for is a reserved keyword for loops in JavaScript.

Does this tool handle inline styles correctly?

Yes. The tool parses CSS style strings and converts them to JavaScript objects. CSS property names are converted to camelCase (for example, font-size becomes fontSize, background-color becomes backgroundColor), and values are wrapped in quotes. Numeric values without units are kept as numbers. The result is a valid JSX style object that React can render without errors.

Can I use this for TSX files?

Yes. The JSX output from this tool is valid in both .jsx and .tsx files. Enable the TypeScript mode toggle to add type annotation hints as comments in the output. The converted JSX syntax is identical for both JavaScript and TypeScript React projects, so you can paste the output directly into either file type.

Does this tool work offline?

Yes. Once the page has loaded, all conversion runs entirely in your browser with no server calls. You can disconnect from the internet and the tool will continue to work. No data is ever uploaded or shared with any third party, making it safe for proprietary code and sensitive content.