CSV ↔ JSON Converter
Convert CSV to JSON array of objects, or JSON back to CSV. Handles quoted fields and headers.
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About CSV ↔ JSON Converter
CSV quirks
CSV is loosely standardized (RFC 4180). Fields with commas, quotes, or newlines need escaping. This calculator handles common cases — for production, use a library like Papa Parse.
JSON limitations
JSON has no native dates, no comments, no trailing commas, requires double-quoted keys. NDJSON (newline-delimited) is preferred for streaming large datasets.
Which format wins
CSV: human-readable, Excel-friendly, simple. JSON: nested data, types preserved, API-native. CSV for tabular flat data; JSON for everything else.