CSV ↔ JSON 変換
区切り文字自動検出の RFC 4180 パーサー
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CSV ↔ JSON 変換
Parse CSV (or TSV / semicolon-delimited) data into JSON arrays of objects, or serialise a JSON array back to CSV. Auto-detects delimiter, supports quoted fields with embedded commas, line breaks and double-quote escapes per RFC 4180.
- Auto-detects comma / tab / semicolon delimiter
- RFC 4180 quoting
- Handles embedded line breaks in quoted fields
- Header row as JSON keys
- Key union for differently-shaped objects
- Runs locally
FAQ
How does delimiter auto-detection work?
We sample the first 4 KB and pick the most frequent of comma, tab, semicolon and pipe.
Does it support nested JSON in CSV cells?
On JSON → CSV, nested objects and arrays are stringified as JSON inside the cell.