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HTML to JSX

Convert HTML markup to JSX syntax for React. Transforms attributes, inline styles, and void elements automatically.

Conversions applied:

  • class β†’ className
  • for β†’ htmlFor
  • style="..." β†’ style={{...}}
  • Void elements (br, hr, img, input) self-closed
  • HTML comments converted to {/* */}

About this tool

HTML to JSX is a converter that transforms standard HTML markup into syntactically valid JSX code for use in React applications. When building React components, developers often need to convert HTML snippets into JSX format, which requires changing attribute names (class to className), handling inline styles differently (string to object), and adapting void elements. This tool automates those transformations, saving time and reducing manual conversion errors.

To use the tool, paste your HTML code into the input box and click "Convert". The converter instantly produces valid JSX output that you can copy directly into your React components. It handles common conversions such as HTML event handlers (onclick to onClick), boolean attributes (checked, disabled), data attributes, and CSS class names. Typical use cases include migrating existing HTML templates to React, integrating third-party HTML snippets, or quickly scaffolding component JSX from mockups.

The converter works entirely in your browser with no server upload, so your code remains private. Keep in mind that complex dynamic templates or conditional rendering logic may still require manual tweaking after conversion. For components with intricate state management or custom logic, the generated JSX serves as a solid starting point that you can refine further.

Frequently Asked Questions

Code Implementation

import re

def html_to_jsx(html: str) -> str:
    jsx = html
    # class -> className
    jsx = re.sub(r'\bclass=', 'className=', jsx)
    # for -> htmlFor
    jsx = re.sub(r'\bfor=', 'htmlFor=', jsx)
    # HTML comments to JSX
    jsx = re.sub(r'<!--(.*?)-->', r'{/*\1*/}', jsx, flags=re.DOTALL)
    # Self-close void elements
    void_elements = ['area','base','br','col','embed','hr','img','input',
                     'link','meta','param','source','track','wbr']
    for tag in void_elements:
        jsx = re.sub(
            rf'<{tag}(\s[^>]*)?>',
            lambda m: m.group(0)[:-1] + ' />' if not m.group(0).endswith('/>') else m.group(0),
            jsx, flags=re.IGNORECASE
        )
    return jsx

html = '<div class="container"><br><img src="x.png" alt=""></div>'
print(html_to_jsx(html))
# <div className="container"><br /><img src="x.png" alt="" /></div>

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