CSV ↔ JSON Converter
Move a small dataset between CSV and JSON without setting up a script. The parser handles quoted fields, embedded commas and escaped double quotes.
LOCALInputs are processed in this browser.
Local data conversionLOCAL COMPUTE
iThe first CSV row becomes JSON keys. JSON input must be an array of objects.
METHOD
Use it without guessing.
- 01Choose CSV to JSON or JSON to CSV.
- 02Paste tabular input and convert.
- 03Check the preview, then copy or download the result.
READ THE RESULT
What the number means
CSV has multiple dialects. This tool uses commas by default, the first row as headers, double quotes for escaped fields and UTF-8 text.
JSON-to-CSV expects an array of flat objects. Nested objects are serialized as JSON strings so that no field is silently discarded.
Before you rely on the output
Does it support commas inside a field?+
Yes, when the field is wrapped in double quotes. Escaped quotes use two consecutive double quotes.
Will numbers stay numbers?+
CSV has no native data types, so CSV-to-JSON values remain strings to avoid changing identifiers or leading zeros.
Is pasted data uploaded?+
No. Conversion happens in your browser.