JSON to CSV Converter

Convert JSON arrays to CSV format

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About JSON to CSV Converter

A JSON-to-CSV converter that transforms arrays of JSON objects into properly formatted CSV data. Auto-detects column headers from object keys, supports custom delimiters, handles nested objects by flattening keys, and produces download-ready output. Complementary to the CSV-to-JSON converter. All processing is client-side for privacy. Essential for data export, spreadsheet preparation, and database migration workflows.

JSON to CSV Converter Features

  • Auto headers
  • Custom delimiter
  • Nested flattening
  • Formatted output
  • Copy/download
Converting JSON to CSV bridges the gap between web APIs (which typically return JSON) and spreadsheet tools (which prefer CSV). This converter handles the transformation automatically, flattening nested objects and producing clean, importable CSV data.

How to Use

Paste JSON array data:

  • Input: A JSON array of objects
  • Headers: Auto-detected from object keys
  • Output: Formatted CSV with proper quoting

JSON to CSV Mapping

Each JSON object becomes a row. Object keys become column headers. Nested objects are flattened with dot notation (e.g., address.city). Arrays are joined with semicolons.

Data Tips

  • Ensure consistent keys across all objects for clean columns
  • Deeply nested JSON may need manual restructuring
  • Large datasets (100MB+) are better handled with CLI tools

Step-by-Step Instructions

  1. 1Paste a JSON array into the input.
  2. 2Check auto-detected headers.
  3. 3Adjust delimiter if needed.
  4. 4View the CSV output.
  5. 5Copy or download the result.

JSON to CSV Converter — Frequently Asked Questions

What JSON format is expected?+

An array of objects: [{"name":"Alice","age":30},{"name":"Bob","age":25}]. Single objects, primitives, or nested arrays need restructuring first.

How are nested objects handled?+

Nested objects are flattened using dot notation. {"user":{"name":"Alice"}} becomes a column 'user.name' with value 'Alice'.

What about missing keys?+

If an object is missing a key that other objects have, the CSV cell will be empty for that row/column combination.

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