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JSON to Table/CSV

Convert JSON arrays to tables or CSV format

■ 01

What is JSON to CSV conversion?

JSON to CSV conversion transforms structured JSON data (typically arrays of objects) into CSV (Comma-Separated Values) format, which is a simple tabular format widely supported by spreadsheet applications like Excel and…

■ 02

How does it work?

This tool converts a JSON array of objects into CSV format by extracting all unique keys from the objects to create column headers. Each object in the array becomes a row, with values positioned according to their keys.…

■ 03

Sample Case

Covers Simple array so you can compare common inputs and outputs quickly.

/ Code

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/ Integration

Source code from the selected tool, shown here alongside the live version on the right.

/ Source Code

TypeScript

typescript

// No npm packages needed - pure Node.js/TypeScript

function jsonToCSV(jsonArray: Array<Record<string, any>>): string {
  if (!Array.isArray(jsonArray) || jsonArray.length === 0) {
    throw new Error('Input must be a non-empty array');
  }

  // Get all unique keys from all objects
  const keys = Array.from(
    new Set(jsonArray.flatMap(obj => Object.keys(obj)))