Is the first row always treated as headers?

By default yes. You can toggle 'Header row' off to produce arrays of arrays instead of arrays of objects.

How does type inference work?

Values matching numeric patterns become numbers; 'true'/'false' become booleans; empty strings become null (if enabled). Otherwise values remain strings.

CSV to JSON Converter

Text Tools· 20 tools

Free CSV to JSON converter. Paste CSV data and get a properly parsed JSON array. Handles quoted fields, embedded commas/newlines, and auto-detects numbers, booleans, and nulls. RFC 4180 compliant.

Delimiter

Header row Infer types Empty → null

CSV Input

JSON Output

[
  {
    "name": "Alice",
    "age": 30,
    "city": "Toronto"
  },
  {
    "name": "Bob",
    "age": 25,
    "city": "Vancouver"
  }
]

Frequently Asked Questions

References

RFC 4180 — Common Format and MIME Type for CSV Files — IETF
JSON.parse — MDN reference — MDN Web Docs

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Frequently Asked Questions

References and sources

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