CSV ⇄ JSON Converter

Convert CSV data to a JSON array of objects, or convert a JSON array back to CSV — both directions, properly quoted and escaped.

How to use this CSV ⇄ JSON converter

To convert CSV to JSON, paste your CSV data into the first box and click Convert. If your data has a header row, leave "First row is header" checked and those values become the object keys; otherwise the tool assigns generic keys like col1, col2. To go the other direction, paste a JSON array of objects into the second box and click Convert — the tool builds a header row from the union of all keys and quotes any field containing a comma, quote, or newline.

Why convert between CSV and JSON

CSV is the lingua franca of spreadsheets and data exports, while JSON is what most APIs and JavaScript code expect. Moving between the two formats by hand is tedious and error-prone, especially once quoted fields, embedded commas, or missing values enter the picture — this tool handles the RFC 4180 quoting rules for you so nothing gets mangled in either direction.