TTKTheTextKit
Developer & Web Tools

JSON to CSV Converter

Paste a JSON array of objects below to convert it into CSV format with a header row. The tool automatically extracts all unique keys as column headers, properly quotes fields that contain commas or double quotes, and produces clean, standards-compliant CSV output ready to paste into spreadsheets.

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About the JSON to CSV Converter

The JSON to CSV Converter first validates that your input is a well-formed JSON array where every element is a flat object (not nested arrays or objects). It then collects all unique keys across every object in the array to form the CSV header row — this means objects don't need to have identical keys; missing keys produce empty cells. Each value is converted to a string and checked: if it contains a comma, a double quote, or a newline, it is wrapped in double quotes per RFC 4180, with internal double quotes escaped by doubling them. The result is a clean, ready-to-paste CSV that opens correctly in Excel, Google Sheets, LibreOffice Calc, or any CSV-compatible tool. Developers use this when converting API responses into spreadsheets for stakeholder review, exporting test data, or migrating data between systems that expect CSV input.

What if my JSON objects have different keys?▾

The converter collects all unique keys from every object in the array to form headers. Objects missing a key will have an empty cell for that column — no data is lost.

Does it handle nested JSON objects?▾

This tool is designed for flat objects (string, number, boolean, null values). Nested objects or arrays are serialized as their JSON string representation in the CSV cell.

What if my input is not a valid JSON array?▾

The tool shows a clear error message explaining what went wrong — whether the JSON is malformed or the top-level value is not an array of objects.