Convert JSON arrays to CSV format and vice versa. Switch between modes with one click.
Automatically flatten nested JSON objects into dot-notation columns (e.g., user.name, user.email).
See your data in a table format before downloading. Verify column names and data integrity.
All conversion happens locally in your browser. Your data never leaves your device.
Convert JSON to CSV online free with FreeToolBox — transform JSON arrays and objects into comma-separated values files that can be opened in Excel, Google Sheets, or any data analysis tool. JSON is the standard format for APIs and web data, but CSV is what most spreadsheet users, data analysts, and BI tools expect. Our converter automatically flattens nested JSON structures, detects column headers from object keys, and produces a clean, properly formatted CSV.
All conversion happens locally in your browser — your JSON data is never sent to any server. This is especially important when working with API responses containing sensitive business data. Paste your JSON, click convert, and download the CSV. Completely free, no account required.
The converter works best with JSON arrays of objects (e.g., [{"name":"Alice","age":30}]). Each object becomes a row and keys become column headers. Nested objects are flattened using dot notation (e.g., 'address.city').
Yes. The tool supports bidirectional conversion. Switch to CSV→JSON mode to parse a CSV file back into a JSON array, with the first row automatically used as key names.
Yes. Values containing commas, quotes, or newlines are wrapped in double quotes and escaped per the RFC 4180 CSV standard, ensuring compatibility with Excel and Google Sheets.
No. The conversion runs entirely in your browser using JavaScript. Your data never leaves your device.