Convert JavaScript Object Notation (JSON) to Comma-Separated Values (CSV) instantly. Our free online tool flattens complex data structures into easy-to-read spreadsheets.

Analyze Your Data

JSON is excellent for storing and transmitting data, but it's not great for human analysis. Spreadsheets like Excel and Google Sheets thrive on tabular data (CSV). Our JSON to CSV converter allows developers, marketers, and analysts to unlock the value hidden inside JSON files by transforming them into a format that's easy to view, filter, and chart.

From analyzing API responses to auditing database dumps, this tool simplifies your workflow by handling the "flattening" of objects automatically.

Key Capabilities

🧊 Intelligent Flattening

Handles nested objects by creating dot-notation headers (e.g., "user.address.city"), preserving the data hierarchy in a flat structure.

📑 Header Generation

Automatically scans your entire dataset to ensure every unique key gets its own column header, even if some objects are missing fields.

⚙️ Custom Delimiters

Need a TSV (Tab-Separated) file or specific separator? Customize the output delimiter to match your requirements.

🚀 Client-Side Speed

Process massive JSON files directly in your browser. No server uploads means faster conversion and total data privacy.

How to Convert JSON to CSV

  1. Input JSON: Paste your JSON array (e.g., [{"id":1}, {"id":2}]) into the editor or upload a .json file.
  2. Preview: The tool will instantly validate your JSON. If there are syntax errors, it will let you know.
  3. Convert: Click the "Convert" button. The tool maps keys to columns and objects to rows.
  4. Export: Copy the CSV text or download it as a .csv file ready for Excel.

Example Transformation

Input (JSON)

[
  {
    "name": "Alice",
    "role": {
      "title": "Admin",
      "level": 1
    }
  },
  {
    "name": "Bob",
    "role": {
        "title": "User",
        "level": 2
    }
  }
]

Output (CSV)

name,role.title,role.level
Alice,Admin,1
Bob,User,2

Frequently Asked Questions

What happens to arrays inside objects?

Arrays inside objects are typically stringified (e.g., "[1, 2]") to fit into a single cell, as CSV does not support native lists.

Can I paste a single object?

Yes, the tool will treat a single object as a one-row CSV file.

Why does Excel show weird characters?

This is usually an encoding issue. Our tool exports in UTF-8. If Excel doesn't display it correctly, try importing the data via the "Data > From Text/CSV" menu in Excel.