CSV to JSON Converter
Convert CSV data to JSON - with auto-type coercion
Handles RFC 4180 quoting (double-quoted fields, escaped quotes as ""). Auto-detects numbers, booleans, and null.
使い方
- 1Paste your CSV
Drop the CSV - comma, semicolon, or tab-separated. RFC 4180 quoting is respected.
- 2Set the options
Toggle whether the first row is a header, and pick the delimiter if it's not a comma.
- 3Copy the JSON
The output is pretty-printed with 2-space indent. Numbers and booleans are auto-coerced.
CSV to JSON Converter について
Free online CSV to JSON converter. Paste any CSV (comma, semicolon, or tab delimited) to get a clean JSON array. Handles RFC 4180 quoting, converts numbers and booleans, and preserves your header row. Runs entirely in your browser. 712 Tools の CSV to JSON Converter はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。
デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。
よくある質問
What does auto-coercion do?
Values that look like numbers become numbers, 'true'/'false' become booleans, 'null' becomes null. Everything else stays a string.
Does it handle quoted fields with commas?
Yes - full RFC 4180 support, including escaped double-quotes as "".
Can I convert JSON back to CSV?
Yes - use the JSON to CSV tool for the reverse direction.
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