JSON to CSV Converter — Free Online JSON to CSV Tool
Convert JSON arrays into CSV format instantly. Flatten nested objects with dot notation, handle complex structures, and download the result as a .csv file. 100% client-side — your data stays private.
How to Use the JSON to CSV Converter
- Paste a JSON array in the left panel. The input must be an array of objects.
- Click "Convert" to flatten nested objects and generate CSV headers.
- Nested objects are flattened using dot notation (e.g.,
address.city). - Download the CSV as a file or copy it to your clipboard.
Why Use This JSON to CSV Converter
Exporting JSON data to CSV is essential when you need to import data into spreadsheets like Excel or Google Sheets. API responses, database exports, and log data often come as JSON, but most data analysis tools work with CSV.
This converter automatically flattens nested objects using dot notation, so deeply nested JSON structures become flat columns that spreadsheet tools can handle. It handles arrays of objects of varying shapes and fills missing fields with empty values.
Frequently Asked Questions
The input must be a JSON array of objects (e.g., [{"key": "value"}, ...]). Each object in the array becomes a row in the CSV. Nested objects are flattened with dot notation.
Nested objects are flattened using dot notation. For example, {"name": "Alice", "address": {"city": "NYC"}} becomes columns name and address.city. Arrays are serialized as JSON strings in the cell.
The tool works entirely in your browser. For most use cases (API exports, data analysis) you won't hit limits. Very large datasets (100K+ rows) may slow down — for those, use a server-side tool.
Use Cases
Spreadsheets & Excel
Export JSON API responses into CSV for analysis in Excel, Google Sheets, or Numbers.
API Data Export
Convert REST API responses from JSON to CSV for reporting and data analysis workflows.
Database Exports
Transform NoSQL database exports (MongoDB, CouchDB) into CSV for import into SQL databases.
Data Migration
Migrate data between systems by converting JSON exports to CSV for cross-platform import.