JSON to CSV Converter

JSON to CSV Converter

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Input
Saved
0 LN0 CH
0.00 KB
JSON →
CSV
CSV →
JSON
Output
0 LN0 CH
0.00 KB

Privacy Promise

Your content never leaves your browser. All processing happens locally on your device using JavaScript. We do not store, record, or transmit your input data to any server.

Client-Side Processing
No Server Logs

Convert JSON data to CSV format instantly. Support for nested objects, large files, and bidirectional conversion.

50-60% Smaller Files

CSV removes redundant field names

~50%
Smaller
Excel
Ready
Rows

Key Features

Reduce File Size

CSV files are typically 50-60% smaller than equivalent JSON. Perfect for reducing bandwidth costs and speeding up data transfers.

Flatten Objects

Automatically flattens nested JSON objects into CSV columns using dot notation. Makes complex API responses spreadsheet-ready.

Bidirectional Conversion

Convert JSON to CSV and CSV back to JSON. Switch between formats seamlessly for different use cases and applications.

100% Client-Side

All conversion happens in your browser. Your data never leaves your device, ensuring complete privacy and security.

Frequently Asked Questions

How does JSON to CSV conversion work?
The tool converts JSON arrays into CSV format. Each JSON object becomes a row, and object properties become columns. Nested objects are automatically flattened using dot notation (e.g., 'address.city').
Will my data be uploaded to servers?
No, 100% private. All conversion happens entirely in your browser using JavaScript. Your JSON and CSV data never leaves your computer, ensuring complete privacy.
Can I convert CSV back to JSON?
Yes! Use the toggle to switch to CSV → JSON mode. The tool reconstructs nested objects from dot notation (e.g., 'user.name' becomes a nested object). Perfect for converting spreadsheet data to JSON.
What happens to nested JSON objects?
Nested objects are automatically flattened into CSV columns using dot notation. For example, {"user": {"name": "John"}} becomes a column named 'user.name'. This makes complex JSON data spreadsheet-ready.
Why is CSV file size smaller than JSON?
CSV files are typically 50-60% smaller. JSON repeats field names for every record, while CSV lists headers once at the top. This reduces bandwidth costs and speeds up data transfers.

What is JSON to CSV conversion?

JSON (JavaScript Object Notation) is a popular data format for APIs and web services, while CSV (Comma Separated Values) is widely used for spreadsheets and data analysis. Converting JSON to CSV simplifies complex data structures into rows and columns, making it easy to open in Excel, Google Sheets, or import into databases.

File Size Advantage: CSV files are typically 50-60% smaller than their JSON equivalents. JSON repeats field names for every record, while CSV lists headers once. For example, a 0.27 KB JSON file becomes just 0.12 KB as CSV - perfect for reducing bandwidth and storage costs.