Excel to JSON Converter

Features

• Multiple Sheet Support: Convert a single sheet or all sheets at once into a structured JSON object
• Header Detection: Use the first row as JSON property names or generate automatic keys
• Type Preservation: Keeps numbers, booleans, and strings as their original Excel types
• Empty Cell Handling: Choose how to represent empty cells — null, empty string, or omit entirely
• Data Preview: See a table preview of your spreadsheet before converting
• Flexible Indentation: Choose between 2 spaces, 4 spaces, tabs, or minified output
• Client-Side Processing: Your files never leave your browser — all processing happens locally

Common Use Cases

Output Format Examples

[
  {"name": "Alice", "age": 28},
  {"name": "Bob", "age": 35}
]

{
  "Sheet1": [
    {"name": "Alice", "age": 28}
  ],
  "Sheet2": [
    {"item": "Laptop", "price": 999}
  ]
}

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