JSON to CSV

What is JSON to CSV Converter?

JSON to CSV Converter by Toolsiro converts JSON arrays into clean, downloadable CSV files directly in your browser. No uploads, no server, no account — paste your JSON and download your spreadsheet-ready CSV in seconds.

JSON is the dominant format for APIs and web data, but spreadsheet users, data analysts, and business teams need their data in CSV to open it in Excel, Google Sheets, or import it into databases. This tool bridges that gap instantly.

How to Convert JSON to CSV

Paste your JSON array into the input panel. The tool parses the JSON, extracts all unique keys from across every object in the array, and generates a CSV where each key becomes a column and each object becomes a row. Choose your output delimiter, whether to include a header row, and whether to quote string values, then click Convert. Copy the result or download it as a .csv file.

Handling Inconsistent Keys

Real-world JSON is rarely perfectly uniform. One object might have a field that another lacks. The converter collects all unique keys across every object in the array and uses them as column headers. Missing values for any key are output as empty cells, keeping the CSV structure valid and complete.

Delimiter Options

CSV files use different delimiters depending on region and application. Comma is the standard in most English-language software. Semicolon is common in European countries where commas are used as decimal separators. Tab creates TSV files that open cleanly in Excel without import wizards. Pipe delimiters are used in legacy systems where data may contain commas.

Quote Control

The quote strings option wraps all text values in double quotes, which prevents delimiter conflicts when your data contains commas or special characters. Values that contain double quotes are automatically escaped according to the CSV specification. Numeric values are never quoted — they remain as plain numbers for correct sorting and calculation in spreadsheet applications.

What JSON Structures Are Supported

The tool works best with a JSON array of flat objects — the most common API response format. Each object in the array becomes one row. Nested objects and arrays are flattened to their string representation in the output cell. If you provide a single JSON object instead of an array, it is automatically wrapped in an array and processed as a single-row CSV.

Common Use Cases

Developers export API responses to CSV for sharing with non-technical stakeholders. Data teams pull JSON from analytics platforms and convert it for Excel reporting. Operations staff convert JSON configuration data to spreadsheet format for review. Product managers export JSON database dumps to CSV for analysis in Google Sheets.