JSON to CSV / CSV to JSON
Convert arrays of JSON objects into spreadsheet-ready CSV files or parse CSV files into structured JSON arrays. Includes an interactive table preview and processes files locally in your browser so sensitive datasets never touch an external server.
How to Use JSON to CSV / CSV to JSON
- 1Select conversion direction: 'JSON → CSV' or 'CSV → JSON'.
- 2Paste your data or upload a local .json / .csv file.
- 3Inspect the parsed rows and columns in the interactive table preview.
- 4Copy the converted output to your clipboard or download the resulting .csv or .json file.
Frequently Asked Questions
How are nested JSON objects handled when converting to a flat CSV table?
Nested keys are flattened into column headers or serialized cleanly so every row aligns with a consistent set of spreadsheet columns.
Are commas or line breaks inside CSV cell values preserved?
Yes. Following RFC 4180 CSV rules, fields containing commas, double quotes, or newlines are automatically wrapped in escaped double quotes so columns do not shift.
Is my spreadsheet or customer data uploaded anywhere?
No. All CSV parsing and JSON serialization execute locally in your browser using client-side JavaScript.
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