JSON ↔ CSV Converter

Convert JSON arrays to CSV and back. Nested objects are flattened automatically.

Delimiter

Flatten nested objects

Arrays as

Null as

JSON Input✓ 0 rows · 0 cols

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[
  {
    "id": 1,
    "name": "Alice Smith",
    "email": "alice@example.com",
    "age": 28,
    "active": true,
    "address": { "city": "New York", "country": "US" },
    "tags": ["admin", "editor"]
  },
  {
    "id": 2,
    "name": "Bob Jones",
    "email": "bob@example.com",
    "age": 35,
    "active": false,
    "address": { "city": "London", "country": "UK" },
    "tags": ["viewer"]
  },
  {
    "id": 3,
    "name": "Carol White",
    "email": "carol@example.com",
    "age": 22,
    "active": true,
    "address": { "city": "Tokyo", "country": "JP" },
    "tags": ["editor", "moderator"]
  }
]

CSV Output

Output appears here…

Conversion notes

JSON → CSV

Input must be an array of objects
Nested objects flattened with dot notation: address.city
Arrays can be joined, stringified, or skipped
Missing fields in some rows become empty cells

CSV → JSON

First row used as field names by default
Auto-detects numbers, booleans, and null
Quoted fields with commas handled correctly
Supports comma, semicolon, tab, pipe delimiters