What does an HTML to JSX converter do?

It transforms standard HTML markup into valid React JSX syntax. Key changes include renaming class to className, for to htmlFor, converting inline style strings to JavaScript objects, self-closing void elements like and , and converting HTML event handlers like onclick to camelCase React equivalents like onClick.

Why does React use className instead of class?

Because JSX compiles to JavaScript, and class is a reserved keyword in JavaScript. To avoid conflicts, React uses className for the CSS class attribute. Similarly, for becomes htmlFor because for is also a reserved word in JavaScript (used in for loops).

Does this tool convert inline styles correctly?

Yes. HTML inline styles like style="color: red; font-size: 16px" are converted to JSX object syntax: style={{ color: 'red', fontSize: '16px' }}. CSS property names are automatically camelCased — font-size becomes fontSize, background-color becomes backgroundColor, and so on.

Can I use the converted JSX directly in my React component?

In most cases yes, but there may be edge cases to review — especially complex nested structures, custom data attributes, or SVG elements. Always test the output in your actual component. The converter handles the most common HTML patterns correctly.

Is my HTML code sent to any server?

No. All conversion happens entirely in your browser using JavaScript. Your HTML code never leaves your device, ensuring complete privacy.

HTML → JSX コンバーター

HTMLをReact JSXに即座に変換します。classをclassNameに、インラインスタイルをオブジェクトに変換し、void要素を自己終了タグにします。

HTML入力0 文字

JSX出力0 文字

使い方

HTMLをReact JSXに即座に変換します。classをclassNameに、インラインスタイルをオブジェクトに変換し、void要素を自己終了タグにします。

1Paste your HTML code into the left input panel.
2The JSX output appears automatically in the right panel.
3Review the converted JSX — check className, htmlFor, and event handlers.
4Click Copy to copy the JSX to your clipboard.
5Use the Paste Example button to see a demo conversion.

主な機能

Converts class → className and for → htmlFor automatically
Transforms inline style strings into JavaScript style objects
Self-closes void elements: <img />, <input />, <br />, <hr />
Converts HTML comments to JSX {/* comment */} syntax
camelCases all HTML event attributes (onclick → onClick)

よくある質問

詳しく読む

HTML to JSX: The Conversion That Trips Up Every React Beginner