Free browser tool

CSV to JSON Converter Online

Paste CSV, choose delimiter and header settings, then copy formatted JSON without sending data to a server. Use it for CSV to JSON with headers, CSV to JSON arrays, quoted fields, spreadsheet exports, API examples, and quick data cleanup.

CSV input

Paste CSV data and choose whether the first row should become JSON object keys.

Try a common CSV shape

Delimiter

First row has headers

JSON output

4 rows and 3 columns parsed locally.

[
  {
    "name": "Maya Chen",
    "role": "Designer",
    "city": "Singapore"
  },
  {
    "name": "Alex Rivera",
    "role": "Engineer",
    "city": "New York"
  },
  {
    "name": "Sam Lee",
    "role": "Growth, Ops",
    "city": "Toronto"
  }
]

Quick answer

CSV rows can become JSON objects when headers are enabled, or JSON arrays when headers are disabled.

With headers

The first row becomes object keys, such as name, role, and city.

Without headers

Each CSV row becomes an array of values, useful for raw table data.

Private by default

Parsing and formatting run in the browser, so pasted snippets are not uploaded.

Best inputs

Good delimiter and header choices make the JSON output predictable.

Delimiter

Match the file delimiter: comma, semicolon, tab, or pipe.

Headers

Turn headers on when the first row contains field names for JSON objects.

Data size

Use pasted samples here; handle very large CSV files with scripts or import tools.

How the CSV to JSON converter works

The parser reads rows, handles quoted values, applies the selected delimiter, and formats the result as JSON.

CSV row + headers → JSON object

When headers are enabled, the converter uses the first row as field names and maps every later row into an object. When headers are disabled, each row remains an array so the output keeps the original table structure.

Example: name,role followed by Maya,Designer becomes {"name":"Maya","role":"Designer"} in the JSON output.

CSV conversion rules

The converter turns rows into JSON objects when headers are enabled.

Example

A header row like name,role becomes JSON keys for each following row.

Assumption

The selected delimiter applies to every row in the pasted CSV.

Limitation

Very large CSV files are better handled with scripts or database import tools.

Common use cases

These are the jobs people usually mean when they search for a CSV to JSON converter.