Tutorial · May 11 2026 · 4 min read

How to Convert JSON to CSV in JavaScript

Learn how to efficiently parse and convert nested JSON arrays into flat CSV strings for data exporting inside your web applications.

Table of Contents

Converting JSON to CSV is a very common requirement when building admin dashboards or data reporting tools.

In this tutorial, we will build a lightweight utility function that flattens JSON objects and maps them into comma-separated values.

Step 1: Flattening the Object

Before converting to CSV, make sure the JSON data is uniform.

Extract headers from the object keys…