JSON CSV Converter

Bidirectional JSON and CSV Conversion Tool

Convert between JSON and CSV formats instantly with customizable options. Support for custom delimiters, header rows, and JSON formatting. All processing happens securely in your browser.

How to Use

Convert between JSON and CSV formats with flexible options:

1. Select Conversion Direction
Choose 'JSON to CSV' or 'CSV to JSON' conversion mode. You can quickly swap the direction using the swap button.
2. Configure Options
Set your preferred options: CSV delimiter (comma, semicolon, tab, or pipe), header row preference, and JSON formatting style (pretty or minified).
3. Convert and Export
Paste or type your data, click Convert, and get instant results. Copy to clipboard or download as a file for further use.

All data is processed locally in your browser. Your data is never uploaded to any server, ensuring complete privacy and security.

JSON CSV Converter

Input Format

Output Format

Conversion Options

CSV Delimiter

CSV Header Row

JSON Format

Input Data

Conversion Result

Practical Use Cases

Spreadsheet Data Conversion

Convert CSV files exported from Excel or Google Sheets to JSON format for web applications, APIs, or data processing scripts.

API Data Processing

Transform JSON responses from REST APIs into CSV format for easy analysis in spreadsheet applications or data visualization tools.

Data Migration

Migrate data between systems that use different formats. Convert legacy CSV databases to modern JSON format or vice versa for system integration.

Report Generation

Convert JSON data from analytics tools or monitoring systems to CSV for creating reports, charts, or presentations in office applications.

Database Export and Import

Convert database exports between CSV and JSON formats for different database systems, backup purposes, or data warehousing operations.

Log File Analysis

Transform structured JSON logs into CSV format for analysis in spreadsheet tools, or convert CSV logs to JSON for log management systems.

About JSON and CSV Formats

JSON and CSV are two widely used data formats, each with distinct advantages for different use cases.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based data format that uses human-readable text to store and transmit data objects. It supports hierarchical structures with nested objects and arrays, making it ideal for complex data representations. JSON is the de facto standard for web APIs and configuration files.

What is CSV?

CSV (Comma-Separated Values) is a simple, tabular data format where each line represents a row and values are separated by delimiters (typically commas). CSV is widely supported by spreadsheet applications like Excel and Google Sheets, making it perfect for data that fits naturally into rows and columns. It's highly portable and easy to read.

Frequently Asked Questions

How do I convert JSON to CSV?

Select 'JSON to CSV' mode, paste your JSON data (array of objects works best), configure your CSV delimiter and header preferences, then click Convert. The tool will automatically transform your JSON into CSV format.

How do I convert CSV to JSON?

Select 'CSV to JSON' mode, paste your CSV data, and click Convert. If your CSV has headers, enable the 'Include Headers' option to use them as JSON object keys. Without headers, numeric indices will be used.

What happens if my CSV doesn't have headers?

If you select 'No Headers' option, the converter will use numeric indices (0, 1, 2, etc.) as JSON object keys. Alternatively, you can manually add a header row to your CSV data before conversion.

Can I use delimiters other than commas?

Yes, the converter supports four common delimiters: comma (,), semicolon (;), tab (\t), and pipe (|). Select your preferred delimiter from the options before conversion to match your CSV format.

Can this tool handle nested JSON structures?

When converting JSON to CSV, nested objects are flattened using dot notation (e.g., 'user.name', 'user.email'). When converting CSV to JSON, the tool creates a flat array of objects with keys from the header row.

Is there a limit to how much data I can convert?

Since all processing happens in your browser, the limit depends on your device's memory. The tool can handle moderate to large files (several MB) on most modern devices. For very large datasets, consider splitting them into smaller chunks.

What character encoding is supported?

The converter uses UTF-8 encoding, which supports all international characters including special symbols, emoji, and non-Latin scripts. Both input and output use UTF-8 for maximum compatibility.

Is my data safe when using this converter?

Absolutely. All conversion happens entirely in your browser using JavaScript. Your data is never uploaded to any server or transmitted over the network, ensuring complete privacy and security.