JSON to CSV Converter Online - Free & Fast
Convert JSON arrays and objects to CSV format with automatic nested object flattening
- Paste JSON array or object in the input field
- Choose delimiter (comma, semicolon, or tab)
- Toggle "Include Headers" to add column names
- Click "Convert to CSV" to generate CSV output
- Nested objects are automatically flattened with dot notation
📖 How to Use
- Paste JSON array or object in the input field
- Select your preferred delimiter (comma, semicolon, or tab)
- Toggle "Include Headers" to add or remove column names
- Click "Convert to CSV" to generate the output
- Copy the result or download it as a .csv file
About the JSON to CSV Converter
The JSON to CSV Converter is a free, browser-based tool designed for developers, data analysts, and anyone who needs to transform JSON data into CSV format for use in spreadsheet applications, databases, or data analysis tools. Whether you're converting API responses, database exports, configuration files, or any JSON data, this tool provides instant conversion with automatic nested object flattening, custom delimiter support, and one-click file download. All processing happens 100% client-side in your browser - your JSON data never leaves your device, ensuring complete privacy and security for sensitive data.
Key Features:
- Nested object flattening: Automatically flattens hierarchical JSON using dot notation (e.g., user.name, user.email)
- Multiple delimiters: Choose between comma (,), semicolon (;), or tab (\\t) for CSV output
- Header control: Include or exclude column headers based on your needs
- Array handling: Converts both JSON arrays and single objects
- One-click download: Download converted CSV file instantly
- Copy to clipboard: Quick copy button for easy pasting
- 100% client-side: All conversion in your browser - no server uploads
- No registration: Free tool with no signup, account, or payment required
- Privacy-focused: Zero data logging, tracking, or storage
- Large file support: Handle JSON files of any reasonable size
Common Use Cases:
- API Data Analysis: Convert REST API or GraphQL JSON responses to CSV for analysis in Excel, Google Sheets, or data visualization tools like Tableau and Power BI
- Database Exports: Transform MongoDB, CouchDB, or NoSQL database exports (JSON format) to CSV for importing into PostgreSQL, MySQL, or other relational databases
- Data Migration: Convert JSON configuration files or data exports to CSV format for importing into legacy systems that only accept tabular data
- Reporting: Transform JSON log files or analytics data into CSV for creating reports, charts, and dashboards in spreadsheet applications
- Bulk Data Processing: Convert large JSON datasets from web scraping, data collection tools, or third-party services into CSV for batch processing or ETL workflows
- Excel Import: Prepare JSON data from APIs or web services for easy import and manipulation in Microsoft Excel or Google Sheets
❓ Frequently Asked Questions
How does JSON to CSV conversion work?
The converter parses JSON arrays or objects and transforms them into comma-separated values format. Each JSON object in the array becomes a row, and object keys become column headers in the CSV file. The tool automatically handles data type conversion, escapes special characters, and formats the output according to CSV standards (RFC 4180).
Can I convert nested JSON objects?
Yes! The tool automatically flattens nested objects using dot notation. For example, {"user": {"name": "John", "age": 30}} becomes columns "user.name" and "user.age" in the CSV output. This makes complex hierarchical JSON data easy to work with in spreadsheet applications like Excel or Google Sheets.
What delimiters are supported?
The tool supports three common delimiters: comma (,), semicolon (;), and tab (\t). Comma is the standard CSV delimiter used in most countries and applications. Semicolon is common in European countries where comma is the decimal separator. Tab delimiter creates TSV (Tab-Separated Values) files, useful for importing into databases and avoiding conflicts with commas in text data.
Can I convert a single JSON object?
Yes! If you provide a single JSON object instead of an array, the tool automatically wraps it in an array and converts it to a single-row CSV with headers. This is useful for converting individual API response objects or configuration objects into tabular format.
Is this JSON to CSV converter free?
Yes, this tool is completely free with no registration, account, or payment required. There are no usage limits, file size restrictions, or premium features. All conversion happens in your browser using client-side JavaScript, so you can use it unlimited times without any cost.
Can I convert large JSON files?
Yes! The converter handles JSON files of any reasonable size entirely in your browser. For very large files (10MB+), conversion may take a few seconds depending on your device's performance, but there is no hard limit. All processing is done locally, so large files won't be uploaded to any server.
How do I handle arrays within JSON objects?
Arrays within JSON objects are converted to JSON strings in the CSV output to maintain data integrity. For example, {"tags": ["red", "blue"]} becomes a cell containing '["red","blue"]'. This preserves the array structure and can be parsed back to JSON when needed. Alternatively, use the nested object flattening feature for array elements if they're objects.
What if my JSON has different structures per object?
The converter automatically detects all unique keys across all objects in the JSON array and creates columns for each. Objects missing certain keys will have empty cells in those columns. This ensures no data is lost even when objects have inconsistent structures, which is common in real-world API responses and NoSQL database exports.
Can I use this for API responses?
Absolutely! This tool is perfect for converting JSON API responses to CSV for data analysis, reporting, or importing into Excel/Google Sheets. Simply paste the JSON response from your API (e.g., REST API, GraphQL), and convert it to CSV for easy viewing and manipulation in spreadsheet software or data analysis tools like Tableau or Power BI.
Is my JSON data secure?
Yes, your data is completely secure. All JSON to CSV conversion happens 100% client-side in your browser using JavaScript. Your JSON data never leaves your device or gets sent to any server. We don't log, store, track, or have any access to your data. This makes it safe to convert sensitive API responses, database exports, or confidential business data.