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CSV ⇄ JSON Converter

Turn CSV into JSON or JSON into CSV. Auto-detect delimiter, preview the result and download the file.

  • Runs in your browser
  • No upload on server
  • Free, forever
  1. Paste your data
  2. Pick the direction
  3. Copy the result

Files stay on your device — parsing happens in your browser.

Result

3 rows · 6 columns

[
  {
    "name": "Ada Lovelace",
    "role": "Engineer",
    "city": "London",
    "joined": "1843-01-01",
    "active": true,
    "score": 99.5
  },
  {
    "name": "Grace Hopper",
    "role": "Admiral",
    "city": "New York",
    "joined": "1944-06-06",
    "active": true,
    "score": 88
  },
  {
    "name": "Katherine Johnson",
    "role": "Mathematician",
    "city": "Hampton",
    "joined": "1953-01-01",
    "active": false,
    "score": null
  }
]
How this works
  • Pick a direction — CSV → JSON or JSON → CSV — and paste your data, or open a file.
  • Choose the delimiter (auto works for most files) and whether the first CSV row is a header.
  • Copy the result, hit Swap to round-trip, or download as .json/.csv.

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