Convert CSV data into a JSON array.
Need to convert CSV to JSON quickly? This free online CSV to JSON converter transforms any comma-separated data into a clean, pretty-printed JSON array in seconds. Paste your CSV, choose whether the first row is a header, and instantly get a JSON array of objects — or a nested array of arrays. No sign-up, no file upload limits, and no data ever leaves your browser.
When checked (the default), the first row of your CSV is treated as column names, and each subsequent row becomes a JSON object keyed by those names. When unchecked, every row — including the first — becomes an array of values, giving you an array of arrays.
Yes. The converter fully supports the CSV standard: fields wrapped in double quotes may contain commas, and a literal double-quote inside a quoted field is represented as two consecutive double-quotes (""). All of these are parsed correctly.
Yes. Fields that contain a plain number (like 42 or 3.14) are converted to JSON numbers, and the strings 'true' / 'false' become JSON booleans. Empty fields become null. Everything else stays a string.
No. All conversion happens entirely in your browser using JavaScript. Your data never leaves your device, making this tool safe for sensitive or proprietary CSV files.