JSON to CSV Converter
JSON Input
Drag & drop your JSON file here
or click to select file
CSV Output
Lightning Fast Conversion
Convert large JSON files to CSV format in seconds with our optimized algorithm that handles complex nested structures efficiently.
100% Client-Side Processing
Your data never leaves your browser. All conversion happens locally ensuring complete privacy and security of your sensitive information.
Nested Object Support
Automatically flattens complex nested JSON objects and arrays into readable CSV columns with intelligent key naming.
Mobile Optimized
Fully responsive design that works perfectly on all devices – smartphones, tablets, and desktops with touch-friendly interface.
Multiple CSV Formats
Choose from comma, semicolon, or tab-separated values to match your specific requirements and regional preferences.
Drag & Drop Support
Simply drag your JSON files directly onto the converter or paste JSON data from clipboard for instant processing.
Frequently Asked Questions
What types of JSON files can I convert?
Our converter supports all standard JSON formats including JSON arrays, single objects, and complex nested structures. It can handle large files up to several MB in size and automatically detects the JSON structure type.
Is my data secure when using this converter?
Absolutely! All conversion processing happens entirely in your browser using client-side JavaScript. Your JSON data is never uploaded to any server, ensuring complete privacy and security of your information.
How does the tool handle nested JSON objects?
The converter intelligently flattens nested objects by creating column names with dot notation (e.g., “user.address.city”). Arrays within objects are converted to comma-separated values within individual cells.
Can I customize the CSV output format?
Yes! You can choose between comma-separated, semicolon-separated, or tab-separated formats. This flexibility ensures compatibility with different spreadsheet applications and regional preferences.
What should I do if my JSON file is very large?
Our tool is optimized for large files, but for extremely large datasets (over 10MB), consider breaking them into smaller chunks. The browser may slow down with very large files due to memory limitations.
Does the tool work offline?
Once the page is loaded, the core conversion functionality works offline since all processing is done client-side. However, you need an internet connection to initially load the tool and any external resources.
Why might my conversion fail or produce unexpected results?
Common issues include invalid JSON syntax, extremely complex nested structures, or circular references. Ensure your JSON is properly formatted and consider simplifying overly complex data structures before conversion.