Online JSON to CSV Converter

Fast, secure, and bidirectional JSON to YAML/CSV converter with instant syntax validation.

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Output
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Introduction

Transform complex, deeply nested JSON arrays into clean, tabular CSV formats ready for Excel, Google Sheets, or database imports.

What is the JSON to CSV Converter and Why Use It?

APIs almost exclusively return data in JSON format, which is great for software development but difficult for data analysis. If you need to present database exports, API responses, or analytics data to non-technical stakeholders, you must convert it into a spreadsheet. Our JSON to CSV Converter automatically parses JSON arrays and flattens nested objects into standard rows and columns. It runs entirely on the client-side, ensuring that your sensitive business data is never exposed to third-party servers.

Key Features

  • 100% Client-Side Privacy: The data conversion happens in your browser's memory. No logs, no server uploads, no data retention.
  • Smart Flattening: Automatically flattens deeply nested JSON objects using dot-notation (e.g., address.city) so no data is lost in the conversion.
  • Custom Delimiters: Choose between comma (,), semicolon (;), or tab delimiters to ensure compatibility with your specific regional Excel settings.
  • Instant Download: Click to immediately download the properly encoded `.csv` file directly to your local machine.

How to Use the JSON to CSV Converter (Step-by-Step)

  1. Step 1: Paste your valid JSON array of objects into the text editor.
  2. Step 2: Select your preferred CSV delimiter (comma is standard, but semicolons are preferred in some European locales).
  3. Step 3: Review the generated CSV output in the preview pane, then click "Download CSV" to save the file for Excel or Google Sheets.

Frequently Asked Questions

Absolutely. The conversion algorithm is written in client-side JavaScript. Your JSON string is processed locally on your device, ensuring zero data leakage.

Nested objects are flattened into single columns using a dot-notation header (for example, a user's city inside an address object becomes the header address.city). Internal arrays are typically stringified to fit within a single CSV cell.

Depending on your operating system's regional settings, Excel may expect a semicolon (;) instead of a comma (,). Try changing the delimiter setting in our tool to "Semicolon" and generate the file again.