JSON to CSV Converter & CSV to JSON - Free Online Tool

Convert JSON to CSV and CSV to JSON online instantly. Free JSON to CSV converter handles nested objects, arrays, and large datasets. No signup required.

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Output

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How to Use

Select the conversion direction: CSV → JSON or JSON → CSV
Paste your data into the input area
Click Convert to transform the data
Copy or download the converted output

Common Use Cases

Converting spreadsheet exports to JSON for API consumption
Transforming API responses to CSV for Excel analysis
Migrating data between different database formats
Preparing test data in different formats

Frequently Asked Questions

How do I convert CSV to JSON online?

Paste your CSV data into the input area. The first row is used as headers. Click Convert to generate a JSON array of objects.

Can I convert JSON back to CSV?

Yes. Switch to JSON → CSV mode, paste your JSON array, and the tool will generate a CSV file with headers derived from object keys.

Does it handle nested JSON objects?

Yes. Nested objects are flattened using dot notation (e.g., address.city) when converting to CSV columns.