Convert JSON arrays to CSV format instantly. Also supports YAML output. Free online JSON to CSV conversion tool for data processing.
What Is JSON to CSV Converter Online?
Converting JSON to CSV transforms structured, hierarchical data into a flat, tabular format that can be opened in spreadsheets like Excel, Google Sheets and Numbers. JSON objects become rows, and their keys become column headers. This is the reverse of CSV-to-JSON conversion and is equally common in data workflows.
The main challenge in JSON-to-CSV conversion is flattening nested structures. A JSON object with nested arrays or sub-objects does not map neatly to a flat table. This tool handles nested data by flattening the structure and using dot notation for nested keys (e.g. "address.city" becomes a column header).
How to Use This Tool
Paste your JSON array of objects into the input area.
The tool detects all unique keys and creates column headers.
Click "Convert" to generate the CSV output.
Review the tabular output and adjust column handling if needed.
Download the CSV file or copy the text for use in a spreadsheet.
Tips & Best Practices
The input should be a JSON array of objects ([ {}, {}, {} ]) — a single object will produce a one-row CSV.
Nested objects are flattened using dot notation in the column headers.
Arrays within objects are typically joined as comma-separated strings in the CSV cell.
Check for missing keys in some objects — the converter will leave those cells empty.
Common Use Cases
Exporting API response data into spreadsheets for analysis or reporting.
Creating CSV data files from database JSON exports.
Generating reports from JSON-formatted analytics or logging data.
Converting structured data for import into tools that only accept CSV.
Frequently Asked Questions
What JSON format is supported?
The tool accepts JSON arrays of objects. Each object becomes a CSV row, and the object keys become column headers.
Can I convert JSON to YAML?
Yes. Premium users can toggle between CSV and YAML output formats.