Helene Update

⚛️ React Developer Tool

HTML to JSX Converter

Paste your HTML and get instant JSX. Automatically handles class → className, for → htmlFor, inline styles, and self-closing tags. Copy-paste ready for React components.

HTML Input
0 lines | 0 chars
JSX Output 
// JSX will appear here...
Ready to convert

What Gets Converted

🏷️

Reserved Words

class → className
for → htmlFor
🎨

Inline Styles

style="color: red" ↓ style={{color: 'red'}}
⚡

Self-Closing Tags

<br>, <img> ↓ <br />, <img />
💬

Comments

<!-- comment --> ↓ {/* comment */}

Common Conversion Patterns

Attribute Changes

tabindex→tabIndex
readonly→readOnly
contenteditable→contentEditable
crossorigin→crossOrigin
maxlength→maxLength
colspan→colSpan

Boolean Attributes

disabled→disabled={true}
checked→checked={true}
selected→selected={true}
required→required={true}
autofocus→autoFocus={true}
multiple→multiple={true}

Data & ARIA

data-id→data-id
aria-label→aria-label
role→role

✓ data-* and aria-* attributes stay as-is

Why Convert HTML to JSX?

JSX (JavaScript XML) is a syntax extension for JavaScript used by React. While it looks similar to HTML, there are important differences that prevent direct copy-pasting:

  • Reserved words: JavaScript keywords like class and for can't be used as attribute names
  • CamelCase: HTML attributes use lowercase; JSX uses camelCase (onclick → onClick)
  • Expressions: JSX uses curly braces {} for JavaScript expressions, not quotes
  • Self-closing: All tags must be explicitly closed in JSX

Manual vs. Automated Conversion

While you could manually convert HTML to JSX, it's tedious and error-prone. Our tool handles:

❌ Manual Process

  • Find and replace class → className
  • Find and replace for → htmlFor
  • Convert style string to object
  • Add / to self-closing tags
  • Convert to {/* */}
  • Fix all camelCase attributes
  • Check for syntax errors

⏱ ~5 minutes per component

✅ Our Tool

  • Paste HTML
  • Click Convert
  • Copy JSX

⏱ ~3 seconds

Edge Cases We Handle

Inline Styles with Multiple Properties

style="color: red; font-size: 14px; margin-top: 10px"

Becomes:

style={{color: 'red', fontSize: '14px', marginTop: '10px'}}

SVG Attributes

stroke-width="2" fill-opacity="0.5"

Becomes:

strokeWidth="2" fillOpacity="0.5"

Event Handlers

onclick="handleClick()" onchange="update()"

Becomes:

onClick={handleClick} onChange={update}

Limitations

Our converter handles 95% of use cases, but some situations need manual review:

  • Template literals: Complex JavaScript inside HTML may need adjustment
  • Custom elements: Web Components might need special handling in React
  • Invalid HTML: Malformed input produces malformed output
  • Dynamic values: Static strings stay strings; you may want to convert some to {'{variables}'}

Frequently Asked Questions

Does this work for React Native?

Partially. React Native uses different components (View, Text instead of div, span). The attribute conversion works, but you'll need to replace HTML elements with Native components.

Can I convert entire HTML files?

Yes, but you'll get better results converting components individually. Full pages often contain <head>, <body> tags that don't belong in React components.

What about TypeScript (TSX)?

The conversion is identical. JSX and TSX share the same syntax rules. Just save your file with .tsx extension.

Is my code sent to a server?

No. All conversion happens in your browser. Your code is never transmitted or stored.

Convert Your First Component

Paste HTML in the editor above and see the magic happen.