Convert JSON API Response to CSV — Free Online Tool
Convert JSON API responses to CSV format instantly — free, no upload, no code. Paste your API JSON, click convert, download CSV. Works with REST APIs, Shopify, Stripe, and more.
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Working with JSON API Responses in Spreadsheets
Every modern REST API returns data in JSON format. When you need to analyze that data in a spreadsheet, share it with non-technical stakeholders, or import it into a database or BI tool, JSON needs to be converted to CSV first. Toolzoid handles this conversion in your browser — paste the JSON, click convert, download the CSV.
Common API JSON Sources
- Shopify: product exports, order history, customer lists
- Stripe: payment records, subscription data, invoice exports
- Google Analytics API: traffic and conversion data
- Airtable: base exports and API responses
- HubSpot / Salesforce: CRM data exports
- GitHub API: repository data, issue lists, contributor stats
- Twitter/X API: tweet data, follower lists
- Any REST API: copy the response body from Postman, Insomnia, or browser DevTools
How to Extract JSON from an API Response
In Postman or Insomnia: after sending a request, the response body appears in the lower panel. Click the body tab, ensure "JSON" format is selected, then select all (Ctrl+A) and copy. In browser DevTools: open the Network tab, click the API request, click the Response tab, right-click the JSON → Copy response. Paste directly into Toolzoid's converter.
Handling Paginated API Responses
Most APIs return data in pages (e.g., 100 records per request). To convert all pages to a single CSV: collect all API responses, merge the arrays manually (combine [...page1, ...page2, ...]), then paste the merged array into Toolzoid. Alternatively, convert each page separately and combine in Excel or Google Sheets using copy-paste below the header row.
Nested Objects in API Responses
APIs frequently return nested objects — {"user": {"id": 1, "address": {"city": "London"}}}. Toolzoid automatically flattens these using dot notation: user.id and user.address.city become separate columns. This means you get all the data in a flat, analyzable format without writing any code to process the nesting manually.