JSON to CSV — Free Online Tool
Convert an array of JSON objects into spreadsheet-ready CSV.
About JSON to CSV Converter
The JSON to CSV Converter transforms an array of JSON objects into clean, spreadsheet-ready CSV in your browser. It automatically detects every unique key across your objects to build a complete header row, making it ideal for exporting API data into Excel or Google Sheets.
Special characters such as commas, quotes, and newlines are escaped correctly so the output is always valid CSV. Because everything is processed locally, your data never touches a server and even large datasets convert instantly and privately.
How to Use JSON to CSV Converter
- Paste a JSON array of objects into the input box.
- Click 'Convert to CSV' to generate the CSV output.
- Copy the result or click 'Download CSV' to save it as a file.
- Open the CSV in Excel, Google Sheets, or any spreadsheet app.
Key Features
Auto-detects all object keys to build complete CSV headers
Safely escapes commas, quotes, and line breaks
Copy to clipboard or download as a ready-to-use CSV file
100% client-side - your JSON data never leaves your browser
Handles large arrays with mixed object shapes
Frequently Asked Questions
What JSON format does this tool expect?
It expects a JSON array of objects, for example [{"name":"Alice"},{"name":"Bob"}]. Each object becomes a row, and the object keys become the CSV column headers.
How are the CSV columns determined?
The converter scans every object and collects all unique keys to build the header row. Missing values in a row are left empty, so rows with different keys still line up correctly.
Are commas and quotes handled safely?
Yes. Any value containing a comma, quote, or line break is automatically wrapped in double quotes and escaped, producing valid CSV that opens cleanly in Excel and Google Sheets.
Is my data uploaded to a server?
No. The conversion runs entirely in your browser, so your JSON data stays on your device and is never transmitted anywhere.