JSON to CSV Converter Online

While developers love working with deeply nested JSON arrays, business analysts and marketing teams need tabular data they can open in Microsoft Excel or Google Sheets. This tool is built to instantly flatten complex API responses into a clean, comma-separated (CSV) format.

Flattening 3D Data into 2D

Converting JSON to CSV is complicated because JSON is multi-dimensional (you can have arrays inside of objects inside of arrays), while CSV is strictly two-dimensional (Rows and Columns). When you paste a JSON array, this script analyzes the keys of the first few objects to dynamically generate column headers. If it encounters a nested object (like "address": {"city": "NY"}), it intelligently flattens it using dot-notation (address.city).

Handling Escaped Characters

A massive issue when generating CSV files is handling strings that already contain commas (e.g., "Location": "London, UK"). If you don't escape that comma, Excel will mistakenly split "London" and "UK" into two separate columns, corrupting the entire dataset. This tool automatically detects commas within your JSON strings and wraps the entire cell in double-quotes, ensuring perfect column alignment.

Client-Side Security

Customer exports often contain highly sensitive emails and phone numbers. Sending that JSON payload to a remote cloud server for conversion is a severe security risk. This tool utilizes browser-native Javascript to loop through the array and generate the CSV string entirely in your local memory.