CSV to JSON

Convert CSV data to a JSON array — auto-detects delimiter, handles quoted fields.

Pretty print

Delimiter:Comma (,) (auto)

CSV input

Drop a CSV file or click to browseDelimiter is auto-detected from the first line

JSON output

[
  {
    "name": "Alice",
    "age": 30,
    "city": "New York",
    "active": true
  },
  {
    "name": "Bob",
    "age": 25,
    "city": "London",
    "active": false
  },
  {
    "name": "Carol",
    "age": 35,
    "city": "Tokyo",
    "active": true
  }
]

How CSV to JSON conversion works

The first row of your CSV is treated as the header row — its values become the JSON object keys. The delimiter is auto-detected by sampling the first line (comma, tab, semicolon, and pipe are all supported), or you can override it with the buttons above. Quoted fields (including those containing the delimiter or newlines) are handled per RFC 4180. Numbers, booleans (true/false), and null are automatically coerced to their native JSON types; everything else stays a string.

To go the other way, use the JSON to CSV converter. For tabular data in other formats, try CSV to YAML or JSON Formatter to validate and prettify the output.

Frequently Asked Questions

How does the tool detect my CSV delimiter?

It auto-detects commas, semicolons, tabs, or pipes by analyzing character frequency in the first few lines. Override the detected delimiter with the dropdown if it guesses wrong.

What if my CSV has no header row?

Enable the 'No header row' option. The converter generates numeric keys (0, 1, 2...) for each column instead of using the first row as field names.

How are quoted fields with embedded commas handled?

The parser follows RFC 4180: fields wrapped in double quotes may contain commas and newlines. Escaped quotes ("") inside a quoted field are decoded to a single double quote.

Can I parse CSV files with accented or special characters?

Yes. The converter handles UTF-8 text including accented characters, CJK, Arabic, and emoji. Drag-drop or paste your file directly — no encoding conversion needed.

What JSON structure does the output use?

An array of objects — one per row, with keys from the header row. Each value is a string unless you enable type inference, which converts numbers and booleans to their native JSON types.

Private & free — this tool runs entirely in your browser.