CSV to JSON Converter Online

Convert CSV data to a JSON array. The header row becomes the JSON keys. Free and browser-based.

How to Use

  1. Enter or paste CSV data in the left pane
  2. Click the 'Convert' button
  3. The JSON result appears in the right pane
  4. Click 'Copy' to copy the result to clipboard

FAQ

Is a header row required?
Yes. The first row is used as key names for the JSON objects.
Is my data sent to a server?
No. All processing happens in your browser. No data is sent externally.
Are delimiters other than commas supported?
Standard CSV (comma-separated) is supported. TSV (tab-separated) is automatically detected.
How do I copy the conversion result?
Click the 'Copy' button in the right pane to copy the result to your clipboard.
Are multibyte characters like Japanese handled correctly?
Yes. CSV encoded in UTF-8 is handled correctly, including multibyte characters.

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Update History

Last Updated: 2026-02-21

  • 2026-02-21 Initial release