JSON ↔ CSV Converter

Convert between JSON and CSV formats with custom delimiters.

About JSON & CSV Conversion

JSON and CSV are two of the most common data interchange formats. JSON (JavaScript Object Notation) is ideal for APIs, configuration files, and nested data structures, while CSV (Comma-Separated Values) excels in tabular data representation and spreadsheet compatibility. Converting between these formats is a frequent task for developers, data analysts, and anyone working with data pipelines. This tool handles bidirectional conversion entirely in your browser with no data sent to any server.

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Frequently Asked Questions

How does the JSON to CSV converter work?▾
It parses your JSON array of objects and extracts all unique keys as CSV column headers. Each object becomes a row, with values mapped to the corresponding columns. All processing happens locally in your browser.
Can I use custom delimiters?▾
Yes — you can choose between comma, tab, semicolon, and pipe delimiters for both JSON-to-CSV and CSV-to-JSON conversions.
What happens if my JSON has nested objects?▾
Nested objects and arrays are automatically serialized as JSON strings within the CSV cell. For best results, use a flat array of objects with primitive values.