CSV ↔ JSON
CSV ↔ JSON. One tool, both directions.
Turn tabular CSV into a JSON array (or NDJSON), or flatten JSON back into CSV. Auto-detect delimiter and encoding, coerce numbers and booleans, join arrays with a custom separator.
Direction
—
Delimiter
Encoding
Output mode
Indent 0 = compact, ignored for NDJSON
Delimiter
Encoding
Array-value separator joins list values in a cell
Both directions
Auto delimiter detect
NDJSON or JSON array
Dot-notation flatten
Number · boolean · null coercion