JSON to CSV Converter

Fast browser-only conversion with flattening, preview, copy, and download.

Private local tool

Turn complex JSON into clean CSV.

Paste JSON, drop a file, choose how nested objects and arrays should behave, then export a spreadsheet-ready CSV without sending your data anywhere.

Paste JSON or upload a file to start.
Rows
0
Columns
0
Input Size
0 B
CSV Size
0 B
Step 1

Add JSON and tune conversion

Drop a .json file here or choose a local JSON/text file from your device
Tip: press Ctrl+Enter or Cmd+Enter to convert.
Step 2

Preview and export CSV

No preview yet. Convert JSON to inspect the first rows.

Everything runs in this browser tab. Your JSON is never uploaded to a server.

JSON to CSV Converter

This JSON to CSV Converter helps turn structured JSON data into spreadsheet-ready CSV. Paste JSON or upload a file, then convert arrays or objects into rows and columns that can be copied, previewed, or downloaded.

The workflow is useful when working with API responses, nested objects, or data exports that need to be opened in Excel, Google Sheets, or database tools.

How to Use This App

  • Paste your JSON data into the input box or upload a JSON file
  • Choose delimiter, header, flattening, and array handling options
  • Click Convert to generate CSV output
  • Review the CSV preview table for rows and columns
  • Copy the CSV output or download it as a .csv file
  • Use Format, Minify, or Clear to clean up and reset your input

Examples and Use Cases

Convert API response data: Paste a JSON array returned from a REST API, such as users, orders, products, or tickets, and convert it into CSV so it can be reviewed in Excel or Google Sheets.

  • User export: Convert JSON like user records with fields such as id, name, email, role, and status into a CSV table for reporting.
  • Nested data cleanup: Flatten nested JSON fields such as address.city or company.name into separate CSV columns for easier filtering and sorting.
  • Testing and debugging: Convert sample API responses into CSV to compare expected and actual values during development or QA testing.
  • Array handling: Convert JSON fields that contain arrays, such as skills or tags, into readable CSV values using the selected array option.
  • Quick spreadsheet preparation: Paste JSON data, preview the rows and columns, then download a .csv file for sharing, importing, or documentation.

Helpful Details

Tips for Better JSON to CSV Conversion

CSV works best when each JSON item has a similar structure. Before converting, check whether your JSON is an array of objects, because that usually creates the cleanest row-and-column output.

  • Use consistent field names: Different keys across records can create extra blank cells in the CSV.
  • Flatten nested objects: Nested values such as user.address.city are easier to filter when converted into separate columns.
  • Choose the right delimiter: Comma is common, but semicolon or tab can help when your values already contain many commas.

Common Conversion Issues

Some JSON structures do not map perfectly to CSV because CSV is a flat table format. Nested objects, arrays, and mixed record types may need special handling before the output is ready for spreadsheets.

  • Invalid JSON: Missing commas, extra trailing commas, or unclosed brackets can stop conversion.
  • Array values: Arrays may appear as joined text, JSON text, or expanded columns depending on the selected option.
  • Missing fields: If one object has a field and another does not, the missing value will appear as an empty CSV cell.

Privacy and Local Processing

This converter is designed to run in the browser, so pasted JSON can be processed without sending it to a remote server. This is useful when checking sample API responses, test data, or internal exports.

  • Review sensitive data: Avoid sharing private API keys, passwords, tokens, or customer data in files you download or copy.
  • Use sample data for testing: Replace real personal values with dummy names, emails, and IDs when possible.

Frequently Asked Questions

What type of JSON can I convert to CSV?

You can convert JSON arrays of objects, single JSON objects, and many API-style JSON responses. An array of objects usually creates the cleanest CSV because each object becomes one row.

Can this tool handle nested JSON objects?

Yes. The converter can flatten nested objects into dot notation columns, such as address.city or company.name, so the data is easier to view in a spreadsheet.

How are JSON arrays handled in the CSV output?

Array values can be kept as JSON text, joined into a readable value, or expanded into separate indexed columns depending on the selected array handling option.

Can I download the converted CSV file?

Yes. After converting the JSON, you can preview the CSV, copy it to your clipboard, or download it as a .csv file.

Why do some CSV cells appear blank?

Blank cells usually mean that a field exists in some JSON records but not in others, or that the original JSON value is null or empty.

Is my JSON data uploaded to a server?

No. The tool is designed to run in your browser, so the conversion happens locally on your device.

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