JSON to CSV Converter — Free Online JSON Formatter Tool

This JSON formatter tool converts any JSON array of objects into a valid RFC 4180 CSV file. Each object becomes a row; all unique keys across all objects become column headers. Missing values in any row are left blank. Nested objects and arrays within a cell are serialised as compact JSON strings so no data is lost.

Paste a JSON array, click Convert to CSV, and download or copy the output. Row and column counts are shown in the toolbar. Useful for exporting API responses into Excel, Google Sheets, or any database import tool. All processing is client-side — your JSON never leaves your browser. For formatting or validating JSON before converting, use the free JSON formatter.