JSON to CSV Converter – Convert, Export & Download Free Online
Convert JSON arrays to CSV
Frequently Asked Questions
What JSON structure does this converter support?
It works best with JSON arrays of objects (the most common format from APIs). Each object becomes a row, and each key becomes a column header. Nested objects are flattened using dot notation.
How does it handle nested JSON objects?
Nested objects are flattened into dot-notation columns (e.g., "address.city", "tags.0"). No data is lost. You can also choose to stringify nested values as raw JSON within the CSV cell.
Can I customize the CSV delimiter?
Yes. Choose between comma, semicolon, tab, or pipe as your delimiter. This is useful when your data contains commas or when importing into systems that expect a specific separator.
Is there a size limit?
The tool handles large datasets (thousands of rows) by processing in Web Workers so your browser stays responsive. Results download as a file for multi-megabyte outputs.
Is my JSON data uploaded to a server?
No. All conversion happens locally in your browser. Your data stays on your machine — nothing is transmitted externally.
Can I open the CSV in Excel?
Yes. The output is a standard CSV file that opens directly in Excel, Google Sheets, LibreOffice Calc, or any spreadsheet application. For native .xlsx output, try our JSON to Excel converter.
JSON to CSV Converter: Convert JSON Arrays to CSV Online Free
JSON arrays are flattened into clean, spreadsheet-ready CSV files by this converter with configurable delimiters, proper quoting, and nested object handling. A JSON array can be pasted or a file uploaded, settings chosen, and the result downloaded. Large datasets are handled using Web Workers so your browser stays responsive. This is one of the most commonly searched developer conversions — also known as "convert json to csv", "export json to csv", and "json to csv online converter".
Handling nested objects
Real-world JSON often has nested objects and arrays. These are flattened into dot-notation columns (e.g., "address.city", "tags.0") so no data is lost. Nested values can also be stringified as JSON within the CSV cell if preferred.
Large dataset support
For JSON arrays with thousands of rows, Web Workers are used to process the data without freezing your browser. The result is downloaded as a file rather than displayed in a textarea, so memory isn't a concern even for multi-megabyte datasets.