Convert JSON to CSV Online — Flatten Arrays & Export to Excel

Free online JSON to CSV converter. Convert API JSON arrays into comma-separated CSV files for Excel, Google Sheets, and data analysis.

✓ Automatically extracts object keys into standardized CSV column headers

✓ Escapes commas, quotation marks, and line breaks automatically

✓ Works with large API payloads up to tens of thousands of rows

✓ Instantly opens in Excel, Google Sheets, or database loaders

How It Works

  1. Paste a JSON array of objects or key-value dictionary.
  2. The engine gathers unique keys across all records to build the header row.
  3. Object rows are serialized with proper RFC 4180 CSV escaping.
  4. Copy the output CSV or import directly into your spreadsheet.