CSV ↔ JSON Converter

Convert CSV to JSON and JSON to CSV

This converter uses a proper RFC-4180-style CSV parser, so quoted fields containing commas, double quotes, or even line breaks are handled correctly. The first row of your CSV is treated as the header, and each following row becomes an object keyed by those headers. Going the other way, a JSON array of objects is flattened to CSV — the union of all keys becomes the header, and any field that contains a comma, quote, or newline is safely quoted and escaped.

It all runs in your browser with no upload, which makes it safe for data exports, API payloads, and spreadsheets you would rather not send anywhere. Paste your text or load a file, pick a direction, and copy or download the result.