Developer Tools

JSON to CSV

Convert a JSON array into CSV rows. Your input stays in this browser during processing.

Private local processing

Your text and settings stays in this browser.

Keep working

Related tools

About JSON to CSV

Convert a JSON array of objects into CSV rows, using the union of the objects' keys as the header, ready for a spreadsheet import.

What the result contains

A CSV whose header is the union of keys found in a non-empty JSON array of objects.

Accepted input

  • JSON
  • PLAIN
  • TXT

How to use JSON to CSV

  1. Paste a JSON array of objects.
  2. Run the conversion and review the generated header row.
  3. Flatten any nested objects or arrays first, since they're written as plain text values.
  4. Download or copy the resulting CSV.
Practical example

Convert an array of customer records into rows for a spreadsheet import.

Check your result before using it

Inspect how nested objects, arrays and missing properties are represented before importing the CSV. A table cannot preserve every JSON structure without a mapping decision. Open a sample in your intended spreadsheet application and check leading zeros, dates and quoted commas. Untrusted cells beginning with formula characters may be interpreted by spreadsheets; review such values before opening or distributing a CSV received from an unknown source.

When to use JSON to CSV

  • Convert an API export of customer records into a spreadsheet
  • Prepare a JSON dataset for import into a CSV-only reporting tool
  • Turn a small structured dataset into rows for quick review

Important limitations

  • Nested objects and arrays are written as string values rather than expanded into separate tables.
  • The top-level JSON value must be a non-empty array of objects.

Troubleshooting JSON to CSV

Columns contain [object Object] or dense values

Flatten nested properties into simple key-value fields before conversion.

Private local processing

The text and settings is processed on this device and is not uploaded to MyFileNest. Closing or refreshing the page clears the active session.

Frequently asked questions

Practical limit: Large text or structured-data inputs can respond more slowly in the browser. Verify generated output before using it in a production workflow.