JSON → CSV
Converter

About JSON to CSV Converter

This free online JSON to CSV converter tool allows you to transform data between JSON and CSV formats instantly. Whether you're a developer working with APIs, a data analyst preparing spreadsheet exports, or anyone needing to convert structured data, our bidirectional converter handles JSON arrays to CSV tables and CSV files to JSON objects seamlessly in your browser. Supports nested values, type inference, and header detection.

Why Convert Between JSON and CSV?

JSON (JavaScript Object Notation) is the standard format for APIs and web applications, offering nested structures and complex data types. CSV (Comma-Separated Values) is universally compatible with spreadsheet software like Excel, Google Sheets, and database imports. Converting between them is essential for data analysis workflows, exporting API responses to Excel, importing spreadsheet data into applications, sharing data with non-technical stakeholders, and migrating data between systems. Manual conversion is error-prone and time-consuming, especially with large datasets or complex structures.

How to Use This Converter

Choose your conversion direction using the toggle: JSON → CSV converts JSON arrays of objects into CSV tables with proper headers and comma-separated values. CSV → JSON converts CSV files into JSON arrays with automatic type inference for numbers, booleans, and null values. Paste your data into the input field, click Convert, and get instant results. Download as .csv or .json files, copy to clipboard, or use the swap button to reverse the conversion and transform the output back.

Key Benefits

• No installation required: Works directly in your browser without any software downloads
• Completely free: No registration, credit card, or hidden fees
• Secure and private: All conversion happens locally - your data never reaches our servers
• Fast processing: Instant conversion with no waiting time or rate limits
• Bidirectional: Convert JSON ↔ CSV with full roundtrip support
• Smart type inference: Automatically detects numbers, booleans, and null values
• Header detection: Auto-detects CSV headers and maps them to JSON keys
• Nested value support: Handles complex JSON structures in CSV conversion

Common Use Cases

Developers use JSON to CSV converters for exporting API responses to Excel for stakeholder reports, converting database query results to spreadsheet format, transforming JSON logs or analytics data for analysis, importing CSV configuration files into applications, generating CSV reports from JSON datasets, testing data transformations in ETL pipelines. Data analysts convert JSON API data to CSV for Excel pivot tables and charts, import web scraping results into Google Sheets, prepare data for visualization tools, and share datasets with non-technical teams. Business users export JSON from web apps to CSV for budget tracking, inventory management, customer databases, and sales reports.

Supported Features

JSON to CSV conversion supports arrays of objects (standard format for tabular data), nested object flattening, consistent column ordering, proper CSV escaping for commas and quotes, and UTF-8 character encoding. CSV to JSON conversion includes automatic header detection, smart type inference (converts "123" to number, "true" to boolean, "null" to null), handling of quoted values and escaped commas, empty value interpretation, and proper JSON array structure generation. Both directions preserve data integrity and handle edge cases like special characters, multi-line values, and empty fields.

Technical Features

The converter processes data entirely client-side with zero latency, handles large datasets efficiently, provides detailed error messages for malformed input, preserves UTF-8 and special characters correctly, generates properly formatted output with consistent indentation, offers download options for both .csv and .json files, includes copy-to-clipboard functionality, and features a swap button for quick roundtrip conversion. The tool validates input syntax and reports specific parse errors to help debug data issues.

Privacy and Security

Unlike online converters that upload your files to remote servers, this tool processes everything locally in your browser using JavaScript. Your customer data, financial records, API responses, analytics datasets, or any sensitive information never leave your computer, making it completely safe for converting confidential data. No cookies, tracking, data storage, or server communication. Perfect for working with GDPR-protected data, internal business records, personal information, or any proprietary datasets that require privacy.