CSV ⇄ JSON Converter

Convert CSV to JSON and back in your browser — quoted fields handled, nothing uploaded.

How to use

  1. Paste your CSV (or JSON) into the input box.
  2. Choose the direction and the delimiter your CSV uses.
  3. Copy the result, or download it as a .json or .csv file.

FAQ

Is my data uploaded anywhere?

No. The conversion runs entirely in your browser. Your data is never sent to a server, so it works offline and stays private — fine for spreadsheets full of real records.

Does it handle commas and quotes inside fields?

Yes. The parser follows the usual CSV rules: fields can be wrapped in double quotes to contain commas or line breaks, and a doubled quote ("") inside a quoted field becomes a single quote. Output is quoted the same way when needed.

Are numbers converted to real numbers?

Values are kept as text by default so nothing is lost or misread (for example, leading zeros in a ZIP code). With a header row, CSV becomes a JSON array of objects keyed by the column names.