TTidy Utils
Developer

CSV to JSON Converter

Convert pasted CSV into JSON arrays or rows locally in your browser.

Need a spreadsheet export instead? Convert JSON to CSV.

How to use CSV to JSON Converter

Best for

  • Turning spreadsheet exports into JSON for docs, tests, and prototypes.
  • Converting comma-separated rows into objects using a header row.
  • Checking CSV data before pasting it into a JSON workflow.

Steps

  1. Paste CSV into the input box.
  2. Choose whether the first row should become object keys.
  3. Review and copy the JSON, or send valid output directly to the TypeScript Type Generator in the same tab.

Notes

  • Quoted fields, embedded newlines, escaped quotes, and empty records are preserved. Duplicate headers are rejected to prevent overwritten values; use array mode to keep every column.
  • CSV cell values remain JSON strings. A TypeScript handoff infers string fields until you review and change the generated types.
  • Very large CSV files may be slow because conversion runs in the browser.

FAQ

Can I convert CSV without headers?

Yes. Turn off header row mode to output each row as an array.

Does CSV to JSON upload my data?

No. The conversion runs locally in your browser.