CSV to JSON Converter

Paste CSV (or upload a .csv file) and get a clean JSON array of objects, using the header row as keys. Handles quoted fields, commas and line breaks inside cells.

Your data is converted locally in your browser and never uploaded.

How to use CSV to JSON Converter

  1. Paste CSV text or upload a .csv file.
  2. The JSON output appears automatically, using row one as the keys.
  3. Optionally tick “Parse numbers” to convert numeric cells to JSON numbers.
  4. Copy the JSON or download it as a .json file.

About this tool

Spreadsheets export CSV, but applications want JSON. This converter maps each data row to an object whose keys come from the header row, so `name,age` plus `Ada,36` becomes `{"name":"Ada","age":36}`.

A proper parser handles the tricky parts of CSV: quoted fields, commas inside quotes and newlines inside cells — the cases that naive “split by comma” scripts get wrong.

When to use it: feeding spreadsheet exports into code, APIs and databases.

Frequently asked questions

Does it support quoted fields?
Yes. Fields wrapped in double quotes may contain commas and line breaks, and doubled quotes ("") are read as a literal quote character, exactly as the CSV standard defines.
What if my CSV has no header row?
The first row is always used as the keys. If yours has no header, add one (for example: col1,col2,col3) before converting.
What about the reverse direction?
The JSON to CSV Converter turns arrays of objects back into spreadsheets, so you can round-trip your data.
Can it handle Excel exports?
Yes — Excel’s “CSV UTF-8” and plain CSV files both parse correctly, including quoted cells that contain commas or line breaks.
Why do some values come through as strings?
Cells are kept as text by default; enable “Parse numbers” to convert purely numeric cells into JSON numbers, and true/false into booleans.
Is my data uploaded during conversion?
No — parsing happens entirely in your browser, which matters for customer lists and financial exports.

Related tools

JSON to CSV Converter Convert a JSON array of objects into a CSV spreadsheet. JSON Formatter Format, indent and beautify JSON data so it is easy to read. JSON Validator Check whether your JSON is valid and find the exact error.

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How to use Csv To Json

Paste your code, data, or URL into the Csv To Json input area. Select the appropriate mode or option, then process. The formatted or converted output appears clearly and can be copied or saved.

Practical benefits

Frequently asked questions

Is this tool free to use?
Yes. Csv To Json is fully free with no account or subscription required.
Does it upload my files?
No. All processing occurs locally within your browser session.
Can I use this for professional projects?
Yes, the tool is designed for both casual and professional use. Always verify critical outputs.