What is JSON to CSV conversion?

JSON to CSV conversion transforms data from JSON (JavaScript Object Notation) format into CSV (Comma-Separated Values) format. This is useful when you need to import JSON data into spreadsheet applications like Excel or Google Sheets.

What does flattening do?

Flattening converts nested JSON objects and arrays into a flat structure with dot-notation keys. For example, an object with nested address becomes separate columns like address.city and address.zip, making it compatible with spreadsheet formats.

Can I use different delimiters?

Yes! You can choose between comma, semicolon, or tab as your delimiter. This is useful when your data contains commas or when working with different regional CSV formats.

How are arrays handled?

Arrays are flattened with index-based keys. For example, an array of tags becomes tags.0, tags.1, tags.2, etc. Each array element gets its own column in the CSV output.

Is this tool free to use?

Yes, our JSON to CSV Converter is completely free and runs entirely in your browser. No registration, no limits, and no backend processing required. All conversion happens locally on your device.

What happens to my data?

Your data never leaves your device. All JSON parsing and CSV generation happens entirely in your browser. We do not store, transmit, or process your data on any server.

Can I download the CSV file?

Yes! After conversion, you can download the CSV as a file with a single click. The file will be named data.csv and is ready to open in Excel or Google Sheets.

Example 1: Simple JSON Array

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

name,age
Alice,25
Bob,30

Example 2: Nested Objects (Flattened)

[
  {
    "name": "Alice",
    "address": {
      "city": "NY",
      "zip": "10001"
    }
  }
]

name,address.city,address.zip
Alice,NY,10001

Example 3: Arrays in JSON

[
  { "id": 1, "tags": ["js", "web"] },
  { "id": 2, "tags": ["python"] }
]

id,tags.0,tags.1
1,js,web
2,python,