Export JSON API Responses to CSV Online Free
Overview
Analysts and product managers often need API data in spreadsheets but do not want to write ETL pipelines for one-off exports. Copy the JSON response from Postman, your browser DevTools, or curl and paste it into the converter. Get a clean CSV in under 5 seconds.
How to Use This Tool
Copy your API JSON response. Paste it into the converter input. If the response is a nested object with an array inside (e.g. {data: [...]}), click Extract Array to target the right field. Click Convert and download the CSV.
Ready to get started? It's free, no registration required, and your files never leave your device.
PDF Tool →Frequently Asked Questions
My API returns a nested object, not a flat array. Can I still convert it?
Yes. Use the 'Extract Array' option to specify the path to the array inside the response (e.g. data.results). The converter then flattens the targeted array into CSV rows.
Can I convert paginated API responses?
Convert each page separately and combine the CSVs in Excel using copy-paste. Make sure all pages have the same column order by letting the first page define the headers.
Does the converter handle ISO date strings in JSON?
Date strings remain as text in the CSV. Excel will parse them as dates if the format matches your locale settings. If not, use Excel's Text to Columns with Date format to convert them.