JSON to CSV Converter
Convert JSON arrays of objects to CSV format. Download as a .csv file for Excel and spreadsheets.
Convert JSON to CSV Online
Many APIs and databases return data as JSON arrays of objects. To analyze this data in Excel, Google Sheets, or other spreadsheet tools, you need to convert it to CSV (Comma-Separated Values) format. Our JSON to CSV converter handles nested objects, arrays, and mixed data types automatically — transforming JSON into clean, downloadable CSV files in seconds.
The JSON to CSV converter on JSON Reader Online works entirely in your browser. Simply paste your JSON array, and the tool automatically extracts all unique keys across every object to build the column headers. Each object in the array becomes a single row in the CSV output. Fields containing commas, quotes, or newlines are properly escaped according to the RFC 4180 standard, ensuring compatibility with all major spreadsheet applications.
How to Convert JSON to CSV
- Paste your JSON array of objects into the editor
- Click the → CSV button in the toolbar
- The converter extracts all unique keys as column headers
- Download the result as a .csv file
Supported JSON Structures
- Flat arrays — Simple arrays of objects with primitive values (strings, numbers, booleans)
- Nested objects — Nested properties are serialized as JSON strings in the CSV cells
- Mixed types — Numbers, strings, booleans, and null values are all supported
- Missing keys — Objects with different keys produce empty cells for the missing columns
- Special characters — Commas, quotes, and newlines within values are properly escaped
Use Cases for JSON to CSV Conversion
Converting JSON to CSV is essential in many workflows. Data analysts use it to import API data into spreadsheets for reporting and visualization. QA engineers convert test results from JSON format to CSV for easier comparison and auditing. Business teams use it to transform CRM or analytics data exports into a format compatible with Excel, Google Sheets, and business intelligence tools.
Before converting, you can use the JSON Validator to ensure your data is syntactically correct, or the JSON Formatter to preview the structure visually. If you need YAML output instead, try the JSON to YAML converter. All tools are free, private, and run entirely in your browser.
Frequently Asked Questions
How do I convert JSON to CSV?
Paste your JSON array of objects into JSON Reader Online, then click the → CSV button. The converter automatically extracts all unique keys as column headers and each object becomes a row. Download the result as a .csv file.
What JSON structure is required for CSV conversion?
The converter works best with a JSON array of flat objects, where each object represents a row. Example: [{"name":"Alice","age":25},{"name":"Bob","age":30}]. Nested objects are serialized as JSON strings in the CSV output.
Can I convert nested JSON to CSV?
Yes. Nested objects and arrays within your JSON are automatically serialized as JSON strings in the CSV cells. For fully flat output, you may want to flatten your JSON manually before conversion.
Can I open the CSV file in Excel or Google Sheets?
Yes. The CSV output uses standard comma-separated format with proper escaping. You can open the downloaded .csv file directly in Microsoft Excel, Google Sheets, LibreOffice Calc, or any spreadsheet application.
Is the JSON to CSV conversion done on a server?
No. All conversion happens entirely in your browser using client-side JavaScript. Your JSON data is never uploaded to any server, ensuring complete privacy and security.