JSON to CSV Converter
Convert JSON arrays to CSV format with automatic header detection, nested object flattening, and proper CSV escaping. All processing happens in your browser.
Features
- Flatten nested objects with dot notation (e.g. address.city)
- Join arrays with semicolons (e.g. tags: admin;user)
- Auto-detect headers from all object keys
- Proper CSV escaping for commas, quotes, and newlines
- Handles single objects and arrays of objects
- Download as .csv file or copy to clipboard
How to Convert JSON to CSV
- 1
Paste JSON Data
Enter or paste a JSON array of objects into the input area.
- 2
Review Headers
Headers are auto-detected from object keys. Nested objects are flattened with dot notation.
- 3
Click Convert
Convert to CSV with proper escaping for commas, quotes, and newlines.
- 4
Download or Copy
Download the CSV file or copy the result to your clipboard.
About JSON to CSV Conversion
JSON to CSV conversion transforms structured JSON arrays into tabular comma-separated values format, bridging the gap between modern API data formats and traditional spreadsheet and database tools. This is essential for importing API response data into Excel or Google Sheets for analysis, exporting database records for business intelligence reporting, preparing data for CRM and ERP system imports, and converting developer-friendly JSON into stakeholder-friendly tabular formats. The ToolPix JSON to CSV converter handles complex nested structures and produces standards-compliant CSV output.
The converter automatically detects column headers from object keys, handles nested objects by flattening them with dot notation (e.g., address.city becomes a column named 'address.city'), joins array values with semicolons for clean multi-value representation, and properly escapes values containing commas, double quotes, or newlines per the RFC 4180 CSV standard. This ensures the output opens correctly in Excel, Google Sheets, LibreOffice Calc, and any other CSV-compatible application without formatting issues or data corruption.
All conversion happens entirely in your browser using ToolPix's client-side JavaScript processing. Your data is never transmitted to any external server, making this tool safe for sensitive business data, customer records, financial API responses, healthcare data exports, and any information subject to privacy regulations like GDPR or HIPAA. There are no file size limits beyond your device's available memory, no daily usage caps, and no registration required.
Whether you are a data analyst converting API data for pivot table analysis, a developer exporting MongoDB or PostgreSQL JSON results for reporting, a business user preparing CRM import files, or a researcher transforming JSON datasets for statistical analysis in Excel, this free online JSON to CSV converter delivers accurate, standards-compliant output instantly.
Key Features
Common Use Cases
- •Convert API responses to CSV for analysis in Excel or Google Sheets
- •Export database query results from JSON format to CSV
- •Prepare data for import into CRM, ERP, or BI tools
- •Transform log data from JSON to CSV for reporting
- •Convert MongoDB exports to tabular format
Frequently Asked Questions
What JSON format is supported?
The input must be a JSON array of objects, e.g., [{"name":"John","age":30},{"name":"Jane","age":25}]. Each object becomes one CSV row.
How are nested objects handled?
Nested objects are flattened using dot notation. For example, {"address":{"city":"NYC"}} becomes a column named 'address.city' with value 'NYC'.
What about special characters in values?
Values containing commas, double quotes, or newlines are automatically wrapped in double quotes per CSV standard (RFC 4180). Internal quotes are escaped by doubling them.
Is there a size limit?
No fixed limit. Since processing happens in your browser, the limit depends on your device's memory. Most devices handle files up to 50MB without issues.
Can I open the CSV file in Excel?
Yes. The output follows the RFC 4180 CSV standard and opens correctly in Microsoft Excel, Google Sheets, LibreOffice Calc, and any other spreadsheet application.
How are array values in JSON handled?
Array values are joined with semicolons in the CSV output. For example, a tags array [web, design] becomes web;design in the corresponding CSV cell.
Can I convert JSON from an API response?
Yes. Simply copy the JSON array from your API response and paste it into the input field. The tool will detect headers and convert all objects to CSV rows automatically.
Is my data sent to any server?
No. All conversion happens entirely in your browser. Your JSON data never leaves your device, making this safe for sensitive business data and customer records.