Convert JSON data to CSV format instantly in your browser. Free, private, no server upload. Supports nested object flattening and custom delimiters.
Our JSON to CSV Converter is a free, client-side tool designed for developers, data analysts, marketers, and anyone who needs to transform structured JSON data into spreadsheet-friendly CSV format. JSON (JavaScript Object Notation) is the standard data format for APIs and modern web applications, while CSV (Comma-Separated Values) is universally supported by Excel, Google Sheets, database imports, and business intelligence tools. This converter bridges the gap between these two formats, allowing you to paste JSON data — whether a single object or an array of objects — and instantly receive clean, properly formatted CSV output. All processing happens entirely in your browser: your data is never uploaded to any server, ensuring complete privacy and security. The tool supports advanced features like nested object flattening (converting nested properties into dot-notation columns), custom delimiter selection (comma, semicolon, tab, or pipe), and optional header row inclusion. Whether you are cleaning API response data, preparing datasets for analysis, or migrating data between systems, this converter saves time and eliminates manual formatting errors.
Yes, completely free. You can convert unlimited JSON data to CSV without registration, API keys, or usage limits.
The converter supports single JSON objects and arrays of objects. Arrays of primitives, deeply nested arrays, or mixed-type arrays may produce unexpected results. Enable flattening to handle nested objects.
When enabled, nested JSON objects are flattened into dot-notation columns. For example, {"user": {"name": "Alice", "age": 30}} becomes columns user.name and user.age in the CSV output.
Absolutely. All conversion happens entirely in your browser. Your JSON data is never sent to any server, API, or third-party service.
Comma (,) is the standard CSV delimiter and works with most software. Use semicolon (;) for European Excel versions, tab (\t) for database imports, or pipe (|) when your data contains commas.