JSON to CSV Converter: Transform JSON Data to Spreadsheet Format
Converting JSON data to CSV is an essential task for developers, data analysts, and anyone working with APIs and databases. JSON (JavaScript Object Notation) is the standard data interchange format for web applications, while CSV (Comma-Separated Values) remains the universal format for spreadsheets, data imports, and reporting tools. Our free online JSON to CSV converter bridges these two worlds instantly.
This tool takes an array of JSON objects and transforms it into clean, well-formatted CSV output. It automatically detects all unique keys across your objects to build the column headers, handles missing values gracefully, and properly escapes fields that contain delimiters, quotes, or newlines. You can choose between comma, semicolon, or tab delimiters depending on your regional preferences or target application.
One of the most powerful features is nested object flattening. When your JSON contains nested objects like {"address": {"city": "NYC", "zip": "10001"}}, the converter flattens them using dot notation (address.city, address.zip), creating clean flat columns perfect for spreadsheet analysis. Arrays within objects are serialized as JSON strings to preserve the data.
Common use cases include exporting API response data into Excel or Google Sheets, preparing database records for CSV import into another system, generating reports from JSON log files, and converting configuration data into tabular format for review. The include/exclude headers toggle is useful when appending data to an existing CSV file.
The converter runs entirely in your browser with no data sent to any server, ensuring complete privacy for sensitive data. It handles thousands of rows efficiently and provides instant preview of the CSV output. You can copy the result to your clipboard or download it directly as a .csv file ready for use in any spreadsheet application.