JSON to CSV Converter

JSON Data

Or Upload a JSON File

Delimiter Flatten nested objects Include headers

Rows: 0 Columns: 0 Size: 0 B

CSV Output

Enter JSON data and click Convert

📦 JSON to CSV Converter Source Code $4.99

Get the complete, ready‑to‑deploy HTML file with all styling and logic. This is the exact code powering the demo above — no dependencies, works offline, and 100% client‑side. Supports nested objects, arrays, custom delimiters, and file upload. Perfect for data migration, API integration, and spreadsheet workflows. One‑time purchase, lifetime access.

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What Is a JSON to CSV Converter?

JSON is the native data format for modern web APIs, while CSV is the universal language of spreadsheets and data analysis tools. This utility bridges the two worlds, transforming structured JSON data into flat, tabular CSV format. It handles nested objects by flattening them with dot notation (e.g., user.name), and automatically detects and merges all fields across your dataset. Whether you're exporting API data for Excel, preparing reports, or migrating between systems, this tool saves hours of manual data transformation.

How to Use

Enter your JSON data by pasting it into the text area or uploading a .json file.
Choose your delimiter — comma, semicolon, tab, or pipe.
Toggle options — flatten nested objects with dot notation, and include or exclude headers.
Click "Convert" — the CSV result appears instantly. Copy it to your clipboard or download it as a .csv file.

Frequently Asked Questions

What JSON structures are supported?

The tool accepts both a single JSON object and an array of JSON objects. Nested objects and arrays are flattened automatically when the "Flatten nested objects" option is enabled.

How are nested objects handled?

When flattening is enabled, nested objects are converted to dot‑notation keys (e.g., address.city). Array values are stringified and joined with semicolons.

Is my JSON data uploaded to a server?

No. All processing happens entirely in your browser using the File API and a custom parser. Nothing is ever sent over the network.

Disclaimer: This tool performs all operations locally in your browser. No data is stored, transmitted, or logged. You are responsible for ensuring you have the rights to convert any data you process.