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JSON to CSV Converter

Convert a JSON array to spreadsheet-ready CSV, or convert CSV back into JSON. Nested objects are flattened into dot-notation columns automatically, entirely inside your browser.

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About JSON to CSV Converter

This JSON to CSV converter online tool turns a JSON array of objects into a spreadsheet-ready CSV file in one click. It is built for the everyday reality of API responses and exported records, where objects often contain nested fields. Rather than failing on that structure, it can flatten nested JSON to CSV by turning nested keys, such as address.city, into their own dot-notation columns.

The same tool works in reverse as a CSV JSON converter, no upload required. Paste raw CSV text with a header row and it parses quoted fields, commas, and line breaks correctly to rebuild a clean JSON array, all inside your browser tab.

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How to Use

  1. Choose JSON to CSV or CSV to JSON depending on the direction you need.
  2. Paste your JSON array of objects, or your raw CSV text with a header row, into the input box.
  3. Click Convert to generate the output instantly.
  4. Use Download CSV to save a spreadsheet file, or Copy Output to copy the result to your clipboard.

Why Use This Converter

Automatic Flattening

Nested objects and arrays are converted into readable dot-notation columns, so a JSON array to spreadsheet conversion never loses data.

RFC 4180 Compliant

Commas, quotes, and line breaks inside values are escaped and quoted correctly, and parsed back correctly, matching the CSV standard.

Bidirectional

One tool covers both directions, so you can convert CSV to JSON free of charge, or go the other way, without switching pages.

Zero Server Contact

Every conversion runs on your device using client-side JavaScript, so your data is never uploaded anywhere.

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Who Should Use This Tool

  • Backend developers exporting API responses or database records into spreadsheet-friendly CSV files.
  • Data analysts who need to convert CSV to JSON free of charge before loading it into a script or notebook.
  • QA testers preparing sample datasets by flattening nested JSON to CSV for spreadsheet review.
  • Product and operations teams who need a quick JSON array to spreadsheet conversion without writing a script.

Privacy first. No JSON or CSV data you paste into this tool is ever uploaded, logged, or stored on a server. Every conversion happens locally in your browser tab.

Paste a JSON array of objects into the input box, keep the JSON to CSV mode selected, and click Convert to instantly generate a downloadable CSV spreadsheet. This JSON to CSV converter online runs entirely in your browser, so there is no upload, sign-up, or file size limit.
Yes, switching to CSV to JSON mode lets you convert CSV to JSON free of charge, with no watermark or usage cap. Paste raw CSV text with a header row and the tool parses it into a clean, pretty-printed JSON array.
Yes, this converter can flatten nested JSON to CSV automatically by turning nested objects into dot-notation column headers, such as address.city. Arrays of primitive values are joined into a single cell, and arrays of objects are flattened using indexed column names.
Converting a JSON array to spreadsheet format means each object in the array becomes one CSV row, and the union of every object's keys becomes the column headers. Missing fields are simply left blank in that row, so objects with different shapes still produce a valid spreadsheet.
Yes, this is a CSV JSON converter no upload tool, meaning your data is parsed and transformed using only client-side JavaScript in your browser tab. Nothing you paste or download is ever sent to, or stored on, a remote server.