JSON to CSV Converter
Convert JSON arrays of objects to RFC 4180-compliant CSV instantly. Data never leaves your device.
Your JSON, uploaded files, and generated CSV are never stored or transmitted to any server. All processing happens locally in your browser.
CSV preview will appear here after conversion.
About this tool
The JSON to CSV Converter is designed for developers, data analysts, students, and digital marketers who need to transform JSON data into spreadsheet-friendly CSV format without installing any software.
Simply paste a JSON array of objects or upload a .json file, click "Convert to CSV", and instantly preview, copy, or download the resulting CSV — all entirely within your browser with no data ever leaving your device.
How to Use
- 1Paste your JSON array into the editor or upload a .json file.
- 2Click "Convert to CSV" to run the conversion.
- 3Preview the generated CSV rendered as an HTML table.
- 4Copy the CSV to your clipboard or download it as output.csv.
Features
- Client-side processing — data never leaves your browser
- JSON file upload with validation (max 5 MB)
- RFC 4180-compliant CSV output with proper quoting and escaping
- Live CSV table preview with up to 200 visible rows
- One-click copy to clipboard and CSV file download
- Handles heterogeneous keys across objects (union headers)
- Detailed inline error messages for invalid input
- Conversion statistics: row and column counts