How are CSV headers handled?

The first row is automatically used as JSON property names. Each subsequent row becomes an object with those property names as keys. Headers are trimmed of whitespace.

Does the tool auto-detect the delimiter?

Yes. The converter automatically detects comma, semicolon, tab, and pipe delimiters by analyzing the first few rows. You can also manually select a specific delimiter if auto-detection picks the wrong one.

How are quoted fields handled?

Fields enclosed in double quotes are parsed correctly, including fields containing commas, newlines, or escaped quotes (""). This follows the RFC 4180 CSV standard.

Are numeric values preserved as numbers?

Yes. Values that are valid numbers are automatically converted to JSON number types instead of strings. Boolean-like values (true/false) are also converted. Empty fields become null.

Can I convert TSV (tab-separated) files?

Yes. TSV files are fully supported. The auto-detection identifies tab characters as delimiters, or you can manually select tab as the delimiter format.

Is my CSV data stored or sent anywhere?

No. All parsing and conversion happens in your browser. Your CSV data never leaves your device. Close the tab and the data is gone.

CSV to JSON Converter Online

How to Convert CSV to JSON

Paste your CSV data into the input panel and the tool instantly produces a JSON array of objects. The first row is used as property names. The tool auto-detects common delimiters including comma, semicolon, tab, and pipe. Quoted fields with embedded commas or newlines are handled correctly. Need to go the other way? Use our JSON to CSV Converter. Download the result as a .json file or copy to clipboard.

Supported Formats

The converter accepts standard CSV, TSV (tab-separated), semicolon-delimited exports from European Excel, and pipe-delimited files. Headers are automatically trimmed of whitespace. Empty rows are skipped. Numeric values are preserved as numbers in the JSON output. Validate the result with our JSON Formatter.

Common Use Cases

Import spreadsheet exports into JavaScript applications or REST APIs. Convert database dumps from CSV to JSON for NoSQL databases like MongoDB. Transform Excel exports into structured data for frontend rendering. Need YAML configuration instead? Try our JSON to YAML Converter. All processing happens in your browser — your data stays private.

CSV to JSON Converter

How to Convert CSV to JSON

Supported Formats

Common Use Cases

Frequently Asked Questions

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