CSV ⇄ JSON Converter

Convert CSV to JSON and back, with numbers and text exactly as you wrote them

calendar_today Last updated: October 9, 2026

Delimiter

First row is the headerNumbers, true/false and blanks become real valuesIndent

CSV

JSON

[
  {
    "id": 1,
    "name": "Notebook, A5",
    "price": 12.50,
    "in_stock": true
  },
  {
    "id": 2,
    "name": "Pen",
    "price": 0.80,
    "in_stock": false
  },
  {
    "id": "12345678901234567890",
    "name": "He said \"hi\" today",
    "price": 3,
    "in_stock": true
  }
]

3 rows

Numbers are copied exactly as typed — 1.50 stays 1.50, and an ID too long for a double is kept as text rather than rounded. Runs in your browser.

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Sahel's CSV/JSON converter converts between the two formats accurately, including quoted fields and multi-line values, in your browser.

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How does this tool work?

1

Paste CSV or JSON

Then set the delimiter and whether the first row is a header.

2

Choose a direction

CSV to JSON or the other way.

3

Copy the output

With quoted fields and embedded commas handled properly.

Frequently asked questions

How does CSV handle a comma inside a field? expand_more

The field is wrapped in quotes; the tool recognises this and writes it back correctly when converting.

What if the delimiter is a semicolon? expand_more

Pick the delimiter from the list: comma, semicolon, tab or pipe.

Do numbers stay numbers? expand_more

You can turn off value conversion so leading zeros are not lost.

Is my data uploaded? expand_more

No. All conversion happens on your device.

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