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CSV to JSON Converter — Auto-Detect Types, Free Online

Paste CSV to convert it to a JSON array of objects, with automatic type detection — numbers and booleans are converted to their real types rather than left as quoted strings, which is the detail that usually needs manual cleanup after a naive conversion.

How to use CSV to JSON

1. Paste your CSV.
2. Review the auto-detected column types.
3. Copy or download the resulting JSON.

Frequently asked questions

Does it guess column headers automatically?

Yes — the first row is used as object keys by default, with an option to treat the data as headerless if your CSV has none.

How does type detection work?

Values that parse cleanly as a number or as true/false are converted to their real JSON type; everything else stays a string, avoiding the common issue of every field ending up quoted.

What if a cell contains a comma inside quotes?

Standard CSV quoting (commas and newlines inside double-quoted fields) is parsed correctly, not just split naively on every comma.

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