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JSON ⇄ CSV Converter

Convert JSON arrays to CSV format and vice versa online. Custom delimiters, headers, and encoding options. All processing done locally for privacy.

Input (JSON Array)
Output (CSV)

JSON ⇄ CSV Converter

Convert JSON arrays to CSV format and vice versa online. Custom delimiters, headers, and encoding options. All processing done locally for privacy.

All JSON to CSV conversion happens locally in your browser. No data is uploaded to our servers, ensuring complete privacy and security.

For best results, use an array of flat objects when converting JSON to CSV. The converter builds the CSV header row from the object keys it finds across the array.

When converting CSV back to JSON, the first row is used as field names when headers are enabled. Numeric and boolean-looking values are converted to matching JSON values where possible.

Best input shape

CSV is a table format, so the cleanest JSON input is an array of objects where each object represents one row.

If later objects contain extra fields, those keys are added to the header set so the exported CSV still includes the available data.

  • [{"name":"Alice","age":30}] converts directly to a header row and one data row.
  • Nested objects are serialized as their JavaScript string representation, so flatten complex data first when exact columns matter.
  • Empty arrays produce an empty CSV output.

CSV options

Use the options panel to match the file format expected by spreadsheets, BI tools, or import pipelines.

Changing the delimiter is useful for regional spreadsheet settings or systems that reserve commas inside text fields.

  • Choose comma, semicolon, tab, or pipe delimiters.
  • Enable UTF-8 BOM when Excel needs help detecting the encoding.
  • Keep quote escaping enabled for fields that contain quotes, delimiters, or new lines.

Practical workflow

Validate the JSON first, convert it to CSV, then open the downloaded file in your spreadsheet or import tool.

For reverse conversion, paste CSV with headers enabled when you want meaningful JSON property names.

  • Use JSON Validator before conversion if the payload came from an API log.
  • Use JSON Beautifier to inspect generated JSON after CSV to JSON conversion.
  • Download the result when you need a stable .csv or .json file.

Frequently Asked Questions

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based data format for structured data exchange widely used in web and API communication.

What is CSV?

CSV (Comma-Separated Values) is a plain text format for tabular data, often used in spreadsheets or databases.

Why convert JSON to CSV?

It makes structured data easy to view, edit, and analyze in spreadsheets.

Is it safe?

Absolutely — everything runs locally in your browser with no uploads.

Related Tools

JSON ⇄ YAML ConverterJSON BeautifierJSON Validator
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