Developer Tools February 25, 2025 · ~5 min read

JSON to CSV Converter: Transform Data for Excel Online

Converting JSON to CSV is a common task for data analysts and developers who need to move data from APIs into spreadsheet software like Excel or Google Sheets. This guide explains how the conversion works and how to handle complex nested data.

What is JSON and CSV?

JSON (JavaScript Object Notation) is a popular lightweight data-interchange format designed for humans to read and machines to parse. It is the standard for modern web APIs.

CSV (Comma Separated Values) is a simple file format used to store tabular data, such as a spreadsheet or database. CSV is the universal language of spreadsheet applications.

Why Convert JSON to CSV?

  • Analysis: Excel and Google Sheets have powerful tools for filtering, sorting, and graphing data that are difficult to do with raw JSON.
  • Reporting: Most business reports are expected in CSV or Excel formats.
  • System Compatibility: Many legacy systems can only import data via CSV files.

Handling Nested JSON Objects

One challenge in conversion is "nesting" (objects inside objects). Our tool handles this by flattening the data. For example:

{
  "user": {
    "name": "Jane",
    "location": "NY"
  }
}

Becomes a CSV column named user.name and user.location. This ensures no data is lost during the transformation.

1Paste your JSON array or object.
2Click Convert to CSV.
3Download the .csv file or copy it to your clipboard.
💡 Pro Tip: If your JSON is large, use minified JSON to speed up the paste process. Our tool handles large datasets locally in your browser for maximum privacy.

FAQ

Is my data stored on your server?

No. Most online converters upload your data to a server. TAPZA's converter works entirely in your browser using JavaScript. Your sensitive data stays on your machine.

Can I convert an array of numbers?

CSV requires a tabular structure. Best results are achieved with an array of objects where each object has the same keys (headers).

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