JSON to CSV Converter

Convert JSON arrays to CSV spreadsheets and CSV files to JSON online. Free JSON to CSV converter — handles nested objects and custom delimiters. No signup required.

Features

Common Use Cases

JSON-to-CSV conversion is needed when you want to open API response data in Excel or Google Sheets, import records into a database via bulk upload, or share structured data with non-technical colleagues. CSV-to-JSON conversion is useful when processing spreadsheet exports in a JavaScript application or Node.js script.

How to Use

  1. To convert JSON to CSV: paste a JSON array of objects and click Convert. The tool extracts headers from the object keys and writes one row per array element.
  2. To convert CSV to JSON: paste your CSV content and click Convert. The first row is used as the key names.
  3. Download the result as a .csv or .json file.
  4. For nested JSON, flatten the structure manually first — CSV is a flat format that cannot represent nesting.

Privacy & Security

All processing for JSON to CSV Converter runs entirely in your browser. Your data — whether text, files, or other content — is never transmitted to any server. DevToolHub has no backend that receives or stores your inputs. This means the tool works even offline once the page has loaded, and there is no risk of your data being intercepted or stored by a third party.

Frequently Asked Questions

My complex JSON with nested objects isn't converting well to CSV. Why?

CSV is a flat format and cannot natively represent nested structures. This tool works best with a JSON array of simple flat objects. For deeply nested JSON, flatten the structure first before converting.

Does this tool support delimiters other than commas for CSV?

The converter handles standard comma-delimited CSV. If your file uses semicolons or tabs, do a find-and-replace on the delimiter before pasting it into the tool.

What happens to special characters and quotes in CSV fields?

Fields containing commas, newlines, or double-quote characters are automatically wrapped in double quotes per the RFC 4180 CSV standard, ensuring correct parsing by Excel, Google Sheets, and CSV libraries.

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