How to Convert JSON to CSV Online Without Writing Code

Introduction

If you need to convert JSON to CSV online without writing code, MyJsonFormatter's JSON to CSV converter does it in seconds. This guide explains how JSON maps to CSV, walks you through a real example, and shows you how to open the result in Excel or Google Sheets.

Why Developers Need JSON to CSV Conversion

REST APIs return JSON. Data analysis tools, spreadsheet applications, and most business intelligence platforms consume CSV. Every data-driven project eventually hits the moment where you need to bridge these two worlds. While Node.js or Python scripts can handle batch conversion, a browser-based tool is far faster for one-off conversions, sharing with colleagues, and quick data exploration.

What JSON Structures Convert Well to CSV?

The ideal JSON for CSV conversion is an array of flat objects:

[
  {"id": 1, "name": "Alice", "city": "London", "score": 95},
  {"id": 2, "name": "Bob",   "city": "Paris",  "score": 87},
  {"id": 3, "name": "Carol", "city": "Tokyo",  "score": 92}
]

This converts to the CSV:

id,name,city,score
1,Alice,London,95
2,Bob,Paris,87
3,Carol,Tokyo,92

How Nested JSON is Handled

Nested objects are flattened using dot notation:

[
  {"user": {"name": "Alice", "age": 30}, "score": 95}
]

Becomes:

user.name,user.age,score
Alice,30,95

Arrays nested within objects are serialised as a quoted string in the cell: "admin,editor". For complex nested arrays, consider flattening your data in code before converting.

Step-by-Step: Convert JSON to CSV with MyJsonFormatter

1. Visit the JSON to CSV Converter.
2. Paste your JSON array into the input panel on the left.
3. Select JSON to CSV from the output format dropdown.
4. Review the CSV preview in the output panel — check headers and row count.
5. Click Download CSV to save the file.

Opening the CSV in Excel or Google Sheets

Excel: Open Excel → Data → From Text/CSV → select your file → choose comma as delimiter → Load.

Google Sheets: File → Import → Upload → select your CSV file → Import type: Replace spreadsheet → Separator type: Comma → Import data.

Frequently Asked Questions

What if my JSON array has objects with different keys?

The converter uses the union of all keys as headers. Objects missing a key will have an empty cell in that column.

Can I convert a single JSON object (not an array)?

Wrap the object in an array: [yourObject]. The result will be a one-row CSV.

Is the downloaded CSV UTF-8?

Yes. The file is saved with UTF-8 encoding, which supports all Unicode characters including non-Latin scripts.

Convert your JSON to CSV now — free, instant, in your browser.