How do I use the JSON to CSV Converter?

Enter or paste your input value, select the source and target formats, then click Convert. The result appears instantly. All conversions run locally in your browser — no data is sent to any server.

Is the JSON to CSV Converter free to use?

Yes, this tool is completely free with no signup required. Everything runs locally: JSON to CSV and other values are processed on your device, never sent to a server — your data is never uploaded to any server, ensuring complete privacy and security.

Is there a file size limit for the JSON to CSV Converter?

Since all conversions happen locally in your browser, the limit depends on your device's memory. Most typical inputs are processed instantly. Very large files may take longer but will still work without server upload.

🔄 JSON to CSV

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Home › Tools › 🔄 JSON to CSV

Free online bidirectional JSON↔CSV converter tool. Convert JSON arrays to CSV tables or CSV data to JSON arrays. Supports nested object auto-flattening, custom delimiters and quote characters. All processing runs in your browser — no data is uploaded.

Client-side·Zero Upload·Large File Ready

JSON→CSVCurrent Mode

0Rows

0Columns

0 BOutput Size

📥 Input

Flatten nested Delimiter: Quote:

📁 File

📤 Output

📊 Data Preview

Click "Convert" to see table preview

About JSON ↔ CSV Converter

JSON (JavaScript Object Notation) and CSV (Comma-Separated Values) are two of the most widely used data interchange formats. This tool provides bidirectional conversion, allowing you to switch seamlessly between them.

JSON to CSV

Converts JSON arrays to CSV format — each object becomes a row, and object keys become column headers. Supports auto-flattening of nested objects and custom delimiter/quote characters.

CSV to JSON

Converts CSV tabular data to JSON arrays — the first row is used as keys (headers), and each subsequent row becomes a JSON object. Supports auto-detection of delimiters, quoted fields, and escape characters.

When to use JSON to CSV

Data Analysis: Convert JSON API responses to CSV for Excel/Google Sheets
Data Import: Transform CSV data to JSON for databases or APIs
Data Migration: Convert between different system formats
Data Cleaning: Inspect and fix data structures by converting formats

❓ FAQ

What JSON structures are supported?

This tool supports Arrays of Objects (the most common structured data format). Each object represents a record, and object keys become CSV column headers. Nested objects can be flattened using the "Flatten nested" option.

How are quoted CSV fields handled?

The tool automatically handles standard CSV quoting — fields containing delimiters, newlines, or quotes are properly wrapped. Double-quote escaping (two quotes for a literal quote) is fully supported.

Is my data uploaded to any server?

No. All conversion processing runs entirely in your browser. Your data never leaves your computer, making it safe for sensitive information.

What file sizes are supported?

Processing is limited by browser memory, typically handling hundreds of thousands of records. For very large files, consider batch processing. You can load .json, .csv, and .tsv files directly via the file upload button.

Can I use custom delimiters?

Yes. You can customize the column delimiter (default: comma) and quote character (default: double quote). For example, set tab delimiter for TSV format, or use single quotes.