Free Online JSON to CSV Converter
Convert your JSON data into CSV format instantly. Paste any JSON array and get a clean, downloadable CSV file. Custom headers, custom delimiters, and nested object support. No uploads, no servers, 100% private.
Waiting for valid JSON array...
Processed entirely in your browser · No data uploaded
How to Use the JSON to CSV Converter
Paste Your JSON
Copy your JSON array from any source — API responses, database exports, or configuration files. Paste it into the input editor.
Configure Options
Customize the header mapping and delimiter to match your needs. You can rename columns, select specific fields, and choose between comma, semicolon, or tab separation.
Download CSV
Preview the converted CSV data and download it as a .csv file. Ready to open in Excel, Google Sheets, or any spreadsheet application.
Powerful JSON to CSV Conversion Features
Everything you need to convert JSON data to spreadsheets — all in one free tool.
Instant Conversion
See your JSON data converted to CSV in real-time as you type or paste. No buttons to click — just paste and go.
Custom Header Mapping
Rename columns, reorder fields, and select which properties to include. Map JSON keys to custom column names.
Custom Delimiters
Choose from comma, semicolon, or tab delimiters. Perfect for different regional CSV formats and spreadsheet applications.
Nested Object Support
Flatten nested JSON objects and arrays into CSV columns with dot-notation keys. Handle complex data structures with ease.
Preview Before Download
See a live preview of your CSV data in a table format before downloading. Verify the output is exactly what you need.
Download CSV File
Download your converted data as a .csv file with one click. Ready to import into Excel, Google Sheets, or any data tool.
Copy to Clipboard
Copy the raw CSV output to your clipboard for quick pasting into emails, documents, or other applications.
100% Client-Side
All processing happens in your browser. Your data never leaves your device — no uploads, no servers, no privacy concerns.
Why Use Our JSON to CSV Converter
The simplest, fastest way to convert JSON to CSV online. No sign-up, no limits, no data leaving your browser.
100% Free
No hidden fees, no premium plans, no usage limits. Convert as much JSON as you need, as often as you want.
Privacy First
Your data never leaves your browser. Everything is processed locally — no server uploads, no data logging.
Fully Customizable
Custom headers, custom delimiters, field selection — you have full control over how your CSV is generated.
Developer-Friendly
Built by developers for developers. Handles complex nested JSON, arrays of objects, and large datasets with ease.
Key Highlights
- No sign-up or registration required
- Processes everything in your browser — zero server uploads
- Supports nested objects with dot-notation flattening
- Custom header mapping and field selection
- Multiple delimiter options: comma, semicolon, tab
- Works on any device — desktop, tablet, or mobile
Frequently asked questions
What is a JSON to CSV converter?
A JSON to CSV converter transforms JSON data (typically an array of objects) into CSV (Comma-Separated Values) format. CSV is the standard format for spreadsheets, making it easy to open your data in Excel, Google Sheets, or any data analysis tool.
Is this JSON to CSV converter really free?
Yes, completely free. There are no hidden charges, no usage limits, and no premium features locked behind a paywall. Use it as much as you need, whenever you need it.
Is my data secure?
Absolutely. All conversion happens entirely in your browser using JavaScript. Your data is never sent to any server, stored, or logged. This means sensitive information stays completely private.
Can I convert nested JSON objects?
Yes! Our converter handles nested JSON objects and arrays by flattening them using dot notation. For example, a nested object like {'address': {'city': 'New York', 'zip': '10001'}} becomes two columns: 'address.city' and 'address.zip'.
Can I customize the column headers?
Yes. You can map JSON keys to custom column names using the header mapping feature. This lets you rename columns, reorder them, and select only the fields you want to include in your CSV output.
What delimiter options are available?
You can choose between comma (,), semicolon (;), or tab as your delimiter. Semicolons are commonly used in European CSV formats, while tabs are useful when your data contains commas.
What size JSON data can I convert?
Our tool can handle JSON data up to approximately 10MB in size. For larger files, your browser may experience performance issues since everything is processed client-side. For typical use cases like API responses and data exports, performance is instantaneous.
Do I need to install anything?
No installation required. The JSON to CSV converter works entirely in your web browser. Just open the page and start converting. No downloads, no plugins, no setup.
Can I use this on my phone?
Yes, the tool is fully responsive and works on all devices — desktops, tablets, and smartphones. The interface adapts to your screen size for comfortable use anywhere.