# CSV ↔ JSON Convert CSV to JSON and back — with configurable delimiter and header row — entirely in your browser. Nothing is uploaded. ### How it works Going **CSV → JSON**, the first row becomes object keys and each following row an object (values are auto-typed to numbers/booleans where obvious). The parser follows RFC 4180 — quoted fields may contain commas, newlines and escaped quotes. **JSON → CSV** flattens an array of objects into rows, quoting any value that needs it. Everything runs locally. --- *Source: [ocxly.com/csv-json.html](https://ocxly.com/csv-json.html) — OCXLY, free 100% client-side privacy-first tools. Free CSV to JSON converter and JSON to CSV converter, with configurable delimiter and header row. RFC 4180 quoted-field support. Runs entirely in your browser.*