JSON to CSV Converter

Convert JSON to CSV or CSV to JSON online. Flattens nested objects & arrays, unions all keys, supports comma/semicolon/tab/pipe delimiters and type inference, free, live, runs locally.

Built and maintained by Shehzad Munir ·

JSON to CSV Converter
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<a href="https://www.toolnova.org/dev-tools/json-csv-converter">JSON to CSV Converter</a> by ToolNova

APA

ToolNova. (2026, September 5). JSON to CSV Converter [Online tool]. https://www.toolnova.org/dev-tools/json-csv-converter

MLA

“JSON to CSV Converter.” ToolNova, 5 Sept. 2026, www.toolnova.org/dev-tools/json-csv-converter.

Convert between JSON and CSV in one click

The JSON to CSV Converter transforms JSON into spreadsheet-ready CSV and back again, intelligently flattening nested objects so the output opens cleanly in Excel. It handles large files entirely in your browser, with nothing uploaded.

Paste JSON to get clean CSV, or paste CSV to get structured JSON, with the tool handling nested fields and headers so you don't have to reformat data by hand. It's the fastest way to move data between APIs, spreadsheets, and databases.

Features

  • Live bidirectional JSON ↔ CSV conversion
  • Flattens nested objects & arrays (dot/index columns)
  • Unions all keys so no columns are dropped
  • Comma, semicolon, tab or pipe delimiters
  • Type inference on CSV → JSON (numbers, booleans, null)
  • Proper quoted-field CSV parser + row/column stats
  • Upload, copy & Excel-ready downloads, runs locally

How to use JSON to CSV Converter

  1. 1

    Paste or upload

    Add your JSON (or CSV) data.

  2. 2

    Pick a direction

    Choose JSON→CSV or CSV→JSON.

  3. 3

    Convert

    Nested objects are flattened into clean columns automatically.

  4. 4

    Download

    Save an Excel-ready CSV or a formatted JSON file.

Common use cases

  • An analyst turns an API's JSON into a spreadsheet.
  • A developer converts CSV export data back into JSON.
  • A marketer opens JSON data in Excel for reporting.
  • A data owner flattens nested records for a database import.

Detailed guide

Built for real-world data wrangling

Developers and analysts constantly bridge the gap between JSON from APIs and CSV for spreadsheets, this converter removes the tedious, error-prone manual step. Everything is processed locally in your browser, so even sensitive datasets never leave your machine.

Frequently asked questions

How do I convert JSON to CSV online for free?

Paste your JSON array or upload your JSON file. The tool flattens it into a CSV format and lets you download the Excel-compatible CSV file instantly, no signup required.

Can it handle nested JSON objects?

Yes. The converter automatically flattens nested objects using dot notation (e.g., user.name becomes a column header). Arrays within objects are handled based on your configuration.

Why convert JSON to CSV?

CSV files open in Excel and Google Sheets for easy data analysis, filtering, and charting. JSON is great for APIs, but CSV is better for non-technical users, data reports, and bulk imports into systems like Salesforce or HubSpot.

Can I convert a large JSON file with thousands of rows?

Yes. The tool processes data locally in your browser and can handle large JSON arrays efficiently. For very large files (100MB+), performance depends on your device's memory.

Does the CSV work directly in Excel?

Yes. The CSV is UTF-8 encoded with proper comma separation, making it compatible with Excel, Google Sheets, LibreOffice Calc, and any other spreadsheet application.

Can I convert CSV back to JSON?

Yes. The converter is bidirectional, switch to CSV→JSON mode, paste your CSV data, and it generates a JSON array where each row becomes an object with column headers as keys. Useful for importing spreadsheet data back into APIs or JavaScript applications.

How do I convert JSON to CSV?

Paste a JSON array of objects and the tool produces CSV with a header row, ready to open in Excel or Sheets. It runs in your browser, so your data is never uploaded.

How does it handle nested JSON?

Nested objects are flattened using dot notation (for example address.city becomes a column), so complex JSON still becomes clean tabular CSV.

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