What JSON structure works best?

An array of objects works best — each object becomes a row, and keys become column headers.

Does the data get uploaded?

No. All conversion happens locally in your browser.

Yes. The output CSV is fully compatible with Excel, Google Sheets, and other spreadsheet tools.

Nested objects are flattened using dot notation (e.g., address.city becomes a column).

fast

Convert JSON data to CSV format online for free. Download as spreadsheet.

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Convert JSON data to CSV format online for free. Download as spreadsheet.

Coming soon — full implementation in progress

Paste your JSON data or upload a .json file.

The tool maps JSON fields to CSV columns instantly.

Download your CSV file ready for Excel or Google Sheets.

Convert CSV files to JSON format online for free.

Format, validate, and minify JSON data online. Syntax highlighting, error detection, and tree view.

Convert CSV files to Excel (XLSX) format online for free.