Flattens nested JSON structures using dot notation (e.g., {"user": {"name": "John"}} becomes header user.name). Arrays can be flattened or exported as separate rows. Handles primitive types (string, number, boolean, null) with appropriate formatting. Configurable delimiter (comma, tab, semicolon), quote character, and date format. Preview the CSV before downloading.
JSON to CSV
Convert JSON data to CSV format instantly. Handle nested objects and arrays. Download CSV files. Free online JSON to CSV converter.
Input JSON
Settings
Usage Tips
- Supports converting JSON array to CSV format
- Automatically extracts all keys as CSV headers
- Handles nested objects and arrays
- Fields containing commas or quotes will be automatically quoted
Frequently Asked Questions
Quick answers to common questions
What JSON formats can I convert?
You can convert any valid JSON array to CSV format. The tool supports nested objects, arrays, and complex data structures. You can also paste JSON from APIs or files.
How are nested objects handled?
By default, nested objects are flattened with dot notation (e.g., 'user.name'). You can customize the separator or choose to ignore nested values if you only want top-level fields.
Can I customize the CSV output?
Yes! You can choose the delimiter (comma, semicolon, tab, or pipe), select which fields to include, and customize the column headers. You can also preview the output before downloading.
Can I convert large JSON files?
Yes! The tool can handle large JSON files with thousands of records. Processing happens in your browser, so there are no server-side file size limitations.
Is my data private?
Absolutely. All conversion happens locally in your browser. Your JSON data is never sent to any server.
View Complete Guide & Tutorials
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Use Cases
Discover how to integrate this tool into your workflow
Data Export
Export JSON data to spreadsheet applications.
- API to Excel
- Database exports
- Analytics data
- Report generation
Data Migration
Convert data formats for system integration.
- System imports
- Data transformation
- Legacy system migration
- Backup conversion
Business Intelligence
Prepare data for analysis in Excel/Sheets.
- Financial reporting
- Sales data analysis
- User statistics
- Performance metrics
About This Tool
Converting JSON to CSV is a common task—export data from an API, open it in Excel, that sort of thing. This tool handles nested JSON (flattens it), arrays of objects, and various data types. Paste your JSON, get back downloadable CSV. Handles date formatting, null values, special characters—the annoying stuff that breaks naive converters.
Technical Details
Algorithm
JSON parsing: converts JSON string to JavaScript object. Flattening: recursively traverse objects, build column headers by joining keys with dots. Each object becomes a CSV row. Special characters (commas, quotes, newlines) in values are properly escaped according to RFC 4180. Array handling: either flatten to single cell or create separate rows (one-to-many relationship).
Privacy Commitment
🔒 **Privacy First**: Unlike server-based tools, AI-TOL processes everything locally in your browser - your data never leaves your device. No uploads, no tracking, completely private.