Converting between JSON and CSV is one of the most common data transformation tasks for developers and data analysts. Whether you're exporting API data for analysis in Excel, preparing data for machine learning, or migrating between systems, our JSON to CSV converter makes this process seamless and secure.
What is JSON to CSV Conversion?
JSON (JavaScript Object Notation) is a lightweight data format commonly used in web APIs and modern applications. CSV (Comma-Separated Values) is a tabular format ideal for spreadsheets and databases. Converting between these formats allows you to leverage the strengths of each: JSON's nested structure for complex data and CSV's simplicity for analysis and reporting.
Why Use Our JSON to CSV Converter?
- 100% browser-based - your data never leaves your device
- No file uploads required - process everything locally
- Handles complex nested JSON structures automatically
- Supports large files without performance issues
- No registration or installation needed
- Works offline once the page is loaded
How to Convert JSON to CSV
Paste Your JSON Data
Copy your JSON array and paste it into the input field. The tool accepts arrays of objects with consistent keys.
Configure Options
Choose delimiter preferences (comma, semicolon, tab) and whether to include headers.
Click Convert
The conversion happens instantly in your browser. Preview the results in the output panel.
Download or Copy
Copy the CSV to clipboard or download as a .csv file ready for Excel or Google Sheets.
Key Features
Nested Object Handling
Automatically flattens nested JSON objects using dot notation (e.g., user.address.city becomes a column).
Array Support
Handles arrays within objects by joining values or creating multiple rows.
Custom Delimiters
Choose between comma, semicolon, or tab separators based on your needs.
Header Row
Automatically generates headers from JSON keys with optional customization.
Type Preservation
Maintains data types where possible for accurate spreadsheet import.
Best Practices for JSON to CSV Conversion
- Ensure your JSON is a valid array of objects before converting
- Keep object keys consistent across all items for clean column headers
- Use meaningful key names as they become your CSV column headers
- For nested data, consider flattening complex structures beforehand
- Validate large files with a small sample first
- Use UTF-8 encoding for international characters
Common Use Cases
API Data Export
Export REST API responses to spreadsheets for analysis, reporting, or sharing with non-technical stakeholders.
Database Migration
Convert JSON exports from NoSQL databases like MongoDB to CSV for import into relational databases.
Data Analysis
Prepare JSON data for analysis in tools like Excel, Google Sheets, or Python pandas.
Machine Learning
Transform JSON datasets into CSV format for ML training pipelines and data preprocessing.
Frequently Asked Questions
Can I convert nested JSON to CSV?
Yes! Our tool automatically flattens nested objects using dot notation. For example, {user: {name: "John"}} becomes a column named "user.name".
What's the maximum file size I can convert?
Since everything runs in your browser, the limit depends on your device's memory. Typically, files up to 50MB work smoothly.
Is my data secure?
Absolutely. Your data never leaves your browser. We don't upload anything to our servers.
Can I convert CSV back to JSON?
Yes! This tool works bidirectionally. Simply paste CSV data and convert to JSON array format.
Ready to Get Started?
100% browser-based. Your data never leaves your device.
Open JSON to CSV Converter