CSV to JSON Converter

Convert CSV to JSON format online for free. Transform CSV spreadsheet data into JSON arrays instantly. No signup required, 100% client-side processing for privacy.

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Our free online CSV to JSON Converter is an essential tool for developers, data analysts, and anyone working with data transformation. It helps you convert CSV spreadsheet data into JSON format quickly and easily. The tool automatically detects data types (numbers, booleans, strings) and handles quoted values with special characters. Whether you're importing spreadsheet data into applications, preparing data for APIs, or converting Excel exports, our tool streamlines your workflow. It's completely free, requires no signup, and processes everything client-side for maximum privacy.
  1. Paste your CSV data into the left input area. The first row should contain column headers.
  2. Click the convert button (arrow) in the middle to transform CSV to JSON.
  3. The JSON output will appear in the right panel as an array of objects.
  4. Use the 'Copy' button to copy the JSON to clipboard, or 'Download' to save as a .json file.
  5. Clear the input to start a new conversion.

What CSV format does this converter accept?

This converter accepts standard CSV format with comma-separated values. The first row should contain column headers, and subsequent rows contain data. Values containing commas, quotes, or newlines should be enclosed in double quotes.

How does the converter handle data types?

The converter automatically detects and converts data types. Numbers are converted to numeric values, 'true'/'false' become booleans, empty values become null, and everything else remains as strings. This ensures your JSON output has proper data types.

Can I convert Excel data to JSON?

Yes! Simply copy your Excel data and paste it into the input area. Excel data copied to clipboard is typically in tab-separated format, but you can also export your Excel file as CSV first for best results.

Is my data safe when using this converter?

Absolutely. All processing happens entirely in your browser using JavaScript. No data is ever sent to our servers. Your CSV data stays on your device, ensuring complete privacy and security.

How are quoted values handled in CSV?

The converter properly handles RFC 4180 compliant CSV files. Values enclosed in double quotes can contain commas, newlines, and escaped quotes (represented as two consecutive double quotes). All special characters are correctly parsed.

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