CSV to JSON Converter

Convert CSV spreadsheets to clean JSON instantly.

Output format

Everything runs in your browser. Nothing is sent or stored anywhere.

About this tool

Spreadsheet exports come as CSV, but your code wants JSON. This free converter turns pasted CSV data into a clean JSON array of objects instantly, the first row becomes the keys, every following row becomes an object, and the output is pretty-printed and ready to paste into your code or API tests.

The parser handles real-world CSV correctly: quoted fields containing commas, escaped quotes, multiline values, and alternative delimiters (semicolon, tab, pipe) for exports from different locales and tools. No more broken conversions from naive split-on-comma scripts.

How to use the csv to json converter

  1. 1Paste your CSV data into the input.
  2. 2Confirm the first row is headers (toggle off if it isn't).
  3. 3The JSON array generates instantly with pretty-printing.
  4. 4Copy the JSON or download it as a .json file.

Good to know

Everything runs locally in your browser, so proprietary or personal data in your spreadsheet never leaves your device. Free, unlimited, no sign-up.

Frequently asked questions

By default yes, the first row becomes the object keys. If your CSV has no header row, toggle the option off and generic keys (column1, column2…) are used.

More free tools you might find useful.

Part of Developer Tools on JoliTools, free tools, no sign-up.