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CSV to JSON Converter

Convert CSV data to JSON format online. Supports custom delimiters and file upload.

Delimiter

First row is headerPretty print

CSV Input

JSON Output

[
  {
    "name": "John",
    "age": "30",
    "city": "New York"
  },
  {
    "name": "Jane",
    "age": "25",
    "city": "London"
  }
]

Rows parsed: 2Columns detected: 3Output size: 138 bytes

About CSV to JSON Converter

Free online CSV to JSON converter that transforms your CSV (Comma-Separated Values) data into clean, properly formatted JSON. Paste CSV text directly or upload a .csv file. Configure the delimiter (comma, semicolon, tab, or pipe), choose whether the first row contains headers, and toggle pretty-print formatting. The tool parses quoted fields correctly, handles escaped quotes, and shows row count, column count, and any parse errors. Copy the JSON output to clipboard or download as a .json file. Also supports reverse conversion - switch to JSON to CSV mode to convert JSON arrays back to CSV. Perfect for data migration, API development, spreadsheet processing, and working with different data formats.

Frequently Asked Questions

How does CSV to JSON conversion work?▾

The converter reads your CSV data row by row. If the first row contains headers, each subsequent row becomes a JSON object with the headers as keys. Without headers, each row becomes a JSON array of values. The result is a JSON array containing all rows.

Can I use semicolons or tabs as delimiters?▾

Yes. The tool supports comma, semicolon, tab, and pipe (|) delimiters. Select your delimiter from the options. This is useful for European CSV files that use semicolons, or tab-separated TSV files.

Does it handle quoted fields with commas inside?▾

Yes. Fields wrapped in double quotes are parsed correctly even if they contain the delimiter character, newlines, or escaped quotes (""). This follows the RFC 4180 CSV standard.

Can I also convert JSON back to CSV?▾

Yes. The tool includes a reverse mode that converts JSON arrays back to CSV format. Switch to JSON-to-CSV mode, paste your JSON, and get clean CSV output. This bidirectional conversion makes it easy to work with data in both formats.

Is this CSV to JSON converter free?▾

Yes, completely free with no signup. Convert any CSV data to JSON instantly, upload files, configure delimiters, and download the result. All processing happens in your browser - your data is never sent to any server.

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