Convert JSON to CSV Online

Converting JSON to CSV flattens your data into a tabular format that works in Excel, Google Sheets, SQL databases, and virtually every analytics and reporting tool. A JSON array of objects becomes a table where each key is a column and each element is a row — the fastest way to turn an API response or database export into something you can pivot, filter, or load into a BI tool.

Common use cases include converting a REST API response for analysis in Excel, transforming a MongoDB or Firestore export for loading into PostgreSQL, flattening structured log data for reporting, and turning bulk exports from Stripe, Shopify, or HubSpot into a spreadsheet. JSON to CSV is the standard first step when you have received structured data from any API-first platform.

JSON's nested structure can cause problems when flattening to CSV. If your objects contain nested arrays or sub-objects, those fields will be serialised as JSON strings in the CSV output. For a cleaner flat result, use the Flatten JSON tool on your file first to expand nested keys into dot-notation columns, then convert to CSV.