CSV to JSON: Convert CSV Data to JSON Arrays

Converting CSV (Comma-Separated Values) to JSON is a common task for developers working with data transformation, API integration, or configuration files. Our free CSV to JSON converter handles complex CSV formatting including headers, quoted fields, and nested commas, delivering clean JSON output instantly.

How to Use

1. Paste or type your CSV data into the input area. The converter automatically detects headers from the first row.
2. Choose your indentation preference from the formatting options (2 spaces, 4 spaces, or tab).
3. View the JSON output in real-time as you type or edit your CSV data.
4. Copy the result to use in your application, API, or configuration file.

The converter works entirely in your browser—no data is sent to any server, ensuring your information stays private.

How It Works

The converter parses CSV data by:

• Detecting headers from the first row and using them as JSON object keys
• Handling quoted fields properly, including escaped quotes ("") within cells
• Preserving commas and newlines inside quoted strings without breaking structure
• Converting each row to a JSON object with header-mapped properties
• Formatting output with your chosen indentation style for readability

The result is a valid JSON array of objects, ready to use in JavaScript, Python, APIs, or databases.

Common Use Cases

• Data migration from spreadsheets to NoSQL databases like MongoDB
• API development when converting tabular data to JSON payloads
• Configuration files transformation for modern application setups
• Testing and mocking data for frontend development
• ETL pipelines as a quick transformation step in data workflows
• Documentation generation from CSV-based content

Frequently Asked Questions

What if my CSV has commas inside fields? The converter handles quoted fields correctly. If a field is wrapped in double quotes (“like, this”), the comma inside won’t break the parsing.

How are headers detected? The first row is automatically treated as headers. Each header becomes a key in the resulting JSON objects.

What about escaped quotes? Standard CSV escaping with double quotes ("") is supported. A field containing "Hello ""World""" converts correctly to Hello "World".

Can I customize the JSON formatting? Yes—choose between 2 spaces, 4 spaces, or tab indentation to match your project’s style guide.

Is my data sent anywhere? No. All conversion happens in your browser using JavaScript. Your CSV data never leaves your device.

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Try our free CSV to JSON converter now.