What is JSON to CSV Conversion?
JSON to CSV conversion transforms structured JSON data into a flat, tabular CSV (Comma-Separated Values) format. While JSON excels at representing hierarchical and nested data structures, CSV is the universal format for spreadsheet applications like Microsoft Excel, Google Sheets, and database import tools.
This tool automatically detects arrays of objects within your JSON data and converts them into CSV rows, with object keys becoming column headers.
How to Use This Tool
- Paste your JSON data into the input area, or upload a
.json file.
- Click Convert to CSV. If your JSON contains multiple arrays, use the Source dropdown to select which array to convert.
- Preview the result in the table view to verify the conversion.
- Click Copy to copy the CSV text, or Download to save it as a
.csv file.
JSON vs CSV: When to Use Which?
- JSON — Best for APIs, configuration files, and data with nested or hierarchical structures. Supports objects, arrays, and multiple data types.
- CSV — Best for flat, tabular data. Ideal for spreadsheets, data analysis, database imports, and simple data exchange.
- Convert JSON to CSV when — You need to import data into Excel/Google Sheets, perform data analysis, or share data with non-technical users.
Frequently Asked Questions
What happens to nested JSON objects during conversion?
Nested objects are flattened using dot notation for column headers. For example, {"address":{"city":"Seoul"}} becomes a column named address.city with the value Seoul. Arrays within objects are serialized as JSON strings in the CSV cell.
Can I convert JSON with multiple arrays?
Yes. The tool automatically detects all arrays of objects in your JSON and presents them in a dropdown selector. You can choose which array to convert to CSV. If no arrays are found, the root object is flattened into a single CSV row.