Data Runs locally
JSON ↔ CSV converter
Convert JSON to CSV or CSV to JSON instantly in your browser. Handles headers, quotes, commas and multiline values without uploads.
JSONCSV
Private · browser only
Your data stays in this browser. Nothing is uploaded.
Conversion directions
Direction 01
JSON to CSV
Turn a JSON object or object array into CSV with a header row.
Direction 02
CSV to JSON
Parse a header-based CSV document into a JSON object array.
Frequently asked questions
Can I convert CSV to JSON on the same page?
Yes. Use Swap to switch between JSON to CSV and CSV to JSON without opening another page.
Does the converter support commas and newlines?
Yes. Properly quoted CSV fields can contain commas, double quotes and line breaks.