OomTools

JSON to CSV Converter

Feed it an array of JSON objects and it produces clean CSV, gathering the column headers automatically and escaping commas, quotes and newlines so nothing breaks in a spreadsheet. It runs in your browser, so the data never leaves your device.

  • 100% free
  • Private & safe
  • Runs in your browser
Read our complete guide: Understanding JSON: How to Validate, Format, and Minify Payloads

Why use JSON to CSV?

JSON to CSV is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.

  • Runs instantly in your browser — nothing to install, nothing uploaded.
  • Completely free, with no account, no watermarks and no usage limits.
  • Handles Input: JSON array of objects; Output: CSV (RFC-4180 style).
  • Paste a JSON array of objects (or a single object).
  • Works on any device — desktop, tablet and phone — and is fully keyboard accessible.

How to use JSON to CSV

  1. Paste a JSON array of objects (or a single object).
  2. Click Convert to CSV; headers are gathered from all objects.
  3. Fields containing commas, quotes or newlines are quoted correctly.
  4. Copy or download the .csv file.

Examples

  • Turning an API's JSON list into a CSV for Excel.
  • Exporting records to import into another system.

Supported formats & limits

  • Input: JSON array of objects
  • Output: CSV (RFC-4180 style)

Limitations

  • Deeply nested values are serialized as JSON text within a cell.
  • The JSON must be an object or an array of objects.

Frequently asked questions

What JSON shape is supported?

An array of objects works best; a single object becomes one row.

How are commas handled?

Values with commas, quotes or line breaks are wrapped in quotes and escaped.

Is my data uploaded?

No — conversion is entirely local.

Was this tool helpful?

From the blog