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JSON to CSV Converter

Convert JSON to CSV instantly in your browser — free online JSON to CSV converter.

Free JSON to CSV Converter

Paste a JSON array of objects into the field above and click Convert to CSV to get comma-separated output. The keys from the first object automatically become the header row. This free online JSON to CSV converter works entirely in your browser — no data is sent to any server.

What Is CSV?

CSV (Comma-Separated Values) is a simple, universally supported text format for tabular data. CSV files can be opened in Microsoft Excel, Google Sheets, Apple Numbers, and any spreadsheet application. It is the most common format for data exchange between business systems, CRMs, marketing platforms, and analytics tools.

Why Convert JSON to CSV?

While JSON is the standard format for web APIs and programming, CSV is the go-to format for human-readable data analysis and reporting. Converting JSON to CSV lets you open API responses in spreadsheets, prepare data for bulk imports into business tools, and generate reports that non-technical stakeholders can easily understand and work with.

How to Use This JSON to CSV Converter

  1. Paste your JSON array of objects into the input field.
  2. Click Convert to CSV to get comma-separated output with a header row.
  3. Copy the result with the copy button and paste it into Excel, Google Sheets, or your application.

Common Uses

  • Exporting API responses to spreadsheet-compatible CSV format for analysis in Excel or Google Sheets
  • Converting database query results from JSON to CSV for reporting and presentations
  • Preparing data for bulk import into CRM, ERP, or marketing automation tools
  • Generating CSV reports from JSON data sources for stakeholders
  • Migrating data from JSON-based APIs to CSV-based data warehouses

Frequently Asked Questions

How do I convert JSON to CSV?
Paste your JSON array of objects into the input field. The tool flattens the structure and creates CSV rows with headers derived from object keys. Arrays of primitives and simple objects convert best. Complex nested objects will have their nested properties flattened with dot notation.
What JSON structures work best?
The ideal input is a JSON array of flat objects where each object has the same keys. Example: [{"name":"John","age":30},{"name":"Jane","age":25}]. Single objects are converted to one-row CSVs. Nested objects are flattened; arrays within objects become comma-separated strings.
How are nested objects handled?
Nested objects are flattened using dot notation. For example, {"user": {"name": "John", "id": 123}} becomes columns named user.name and user.id. Deep nesting is supported but may create long column names.
What happens to arrays in the JSON?
Arrays within object values are converted to comma-separated strings. For example, {"tags": ["red", "blue", "green"]} becomes a single column tags with value "red,blue,green". Top-level arrays of primitives are converted to single-column CSVs.
Can I customize the CSV output?
Yes. Options typically include: delimiter character (comma, semicolon, tab), whether to include headers, how to handle null/undefined values, quote style for fields, and line ending format (Unix LF or Windows CRLF).
Is this tool secure?
Yes. All conversion happens entirely in your browser. Your JSON data and generated CSV are never sent to any server. For sensitive data exports or API responses, this local processing ensures your information stays private.

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