CSV ↔ JSON Converter
Free online tool to convert between CSV and JSON formats instantly. Perfect for data import/export, spreadsheet processing, and API data transformation.
How to Use This Tool
Using our CSV to JSON converter is simple and straightforward. Start by selecting your conversion direction using the toggle buttons above – choose CSV → JSON to convert CSV data to JSON format, or JSON → CSV to convert JSON to CSV. Paste or type your data into the left input box, and the conversion happens instantly as you type. The converted output appears in the right box in real-time.
For CSV input, you can customize the delimiter (comma, tab, semicolon, or pipe), specify whether the first row contains headers, and choose the JSON output format. For JSON input, the tool will automatically convert arrays of objects into properly formatted CSV with headers. Once your data is converted, you can copy the result to your clipboard with one click using the "Copy to Clipboard" button, or download it as a file using the "Download" button.
All processing happens entirely in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security. No account registration, no data storage, no tracking – just fast, reliable conversion whenever you need it. Perfect for developers handling sensitive business data or personal information.
Common Use Cases
CSV and JSON are two fundamental data formats in modern software development. CSV (Comma-Separated Values) is the universal format for spreadsheet data, database exports, and data analysis tools like Excel, Google Sheets, and Tableau. JSON (JavaScript Object Notation) is the standard format for REST APIs, NoSQL databases like MongoDB, and web applications due to its flexible structure and native JavaScript support.
Developers frequently need to convert between these formats when importing spreadsheet data into APIs, exporting database records for analysis, or transforming data between different systems. For example, you might export customer data from Google Sheets as CSV and need it as JSON for your backend API, or you might fetch JSON data from a REST API and need to convert it to CSV for visualization in Excel or data analysis in Python pandas.
This converter is also invaluable for data migration projects, ETL (Extract, Transform, Load) pipelines, testing API endpoints, preparing test data, and learning data transformation concepts. Whether you're a data scientist, backend developer, business analyst, or database administrator, this tool streamlines your workflow and saves valuable time on manual data formatting.
Why Use Our CSV Converter?
Privacy First
Your data never leaves your browser. All conversion happens client-side using JavaScript, ensuring complete privacy and security for sensitive business data, customer records, or personal information.
Lightning Fast
Instant real-time conversion as you type. No waiting for server requests or processing delays. Handles large datasets efficiently with thousands of rows and works offline once loaded.
Reliable & Free
Built with the industry-standard PapaParse library trusted by millions of developers. Handles complex CSV with custom delimiters, quotes, and edge cases. No signup, no payment, no limitations.
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Frequently Asked Questions
What is the difference between CSV and JSON?
CSV (Comma-Separated Values) is a simple tabular format where data is arranged in rows with values separated by delimiters (commas, tabs, etc.). It's ideal for spreadsheet data but limited to flat structures. JSON (JavaScript Object Notation) is a flexible format supporting nested objects, arrays, and multiple data types, making it perfect for complex data structures and APIs.
Is my CSV data safe when using this converter?
Yes, absolutely. All conversion happens entirely in your browser using JavaScript. Your data never leaves your device or gets sent to any server. This makes it safe to convert sensitive business data, customer records, financial information, or any confidential CSV files without privacy concerns.
Can I convert large CSV files with thousands of rows?
Yes, the converter can handle large CSV files efficiently. It uses PapaParse, an industry-standard library optimized for performance. Since processing happens in your browser, the only limitation is your device's memory. Files with tens of thousands of rows typically convert in seconds.
What delimiters are supported for CSV files?
The converter supports comma (,), tab (\t), semicolon (;), and pipe (|) delimiters. You can select your preferred delimiter in the conversion options. The tool also handles quoted fields, escaped characters, and various CSV dialects commonly used by Excel, Google Sheets, and other applications.
Can I save my conversion history?
Yes, you can save conversions to your browser's local history using the "Save to History" button. All history is stored locally in IndexedDB and never leaves your device. You can view, restore, and delete history entries at any time using the "Show History" button.
📚 CSV vs JSON: When to Use Each
Not sure which format to use for your project? Learn the key differences, strengths, and ideal use cases for CSV and JSON formats.
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