Free CSV to JSON Converter

Convert CSV data to JSON format. Free, fast, and private—all processing happens in your browser.

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Transform CSV data into JSON format instantly. Perfect for API development, data migration, and working with modern web applications.

Features

**Header Detection**: First row automatically becomes JSON keys.

**Custom Delimiters**: Support for comma, semicolon, tab, and pipe separators.

**Type Detection**: Numbers and booleans are converted to proper JSON types.

**Nested Output**: Option to create nested JSON structures.

Example

**CSV:** ``` name,age,city John,30,NYC Jane,25,LA ```

**JSON:** ```json [ {"name":"John","age":30,"city":"NYC"}, {"name":"Jane","age":25,"city":"LA"} ] ```

Frequently Asked Questions

Does the first row need to be headers?

By default, yes. The first row becomes JSON object keys. You can disable this to get arrays instead.

What delimiters are supported?

Comma (,), semicolon (;), tab, and pipe (|) are all supported. Auto-detect is also available.

Can I convert JSON back to CSV?

Yes! Our tool works both ways—CSV to JSON and JSON to CSV.

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