Spreadsheets export CSV; APIs consume JSON. Our free CSV to JSON Converter bridges the gap without a detour through Excel or a Python script: paste your CSV, pick the delimiter, and get a formatted JSON array instantly. The parser is a proper state machine, not a naive split-on-commas — quoted fields can contain commas, escaped double quotes and even line breaks, exactly as real-world exports do. Free forever, no signup.
With “first row is headers” on (the default), every row becomes an object keyed by your column names; turn it off to get plain arrays instead. Everything runs in your browser, so customer lists and internal data never travel to a server. When something is off, you get the exact row number — an unterminated quoted field or a ragged row is reported precisely rather than producing silent garbage.
Copy the JSON or download it as a .json file. It is perfect for seeding test fixtures, feeding no-code tools, or turning an export into an API-ready payload in seconds.
CSV to JSON Converter
Turn CSV data into JSON arrays with proper quoted-field parsing.
How to use
- Paste your CSV data into the text box.
- Set the Delimiter if it is not a comma (e.g. semicolon or tab).
- Leave First row is headers checked to get objects, or uncheck for arrays.
- Click Convert to JSON.
- Click Copy JSON or Download .json to take the result.
- Fix any row reported in an error message, then convert again.
FAQs
Can fields contain commas or line breaks?
Yes. Properly quoted fields — like “Gadget, Pro” — may contain commas, doubled double-quotes (“”) and even newlines. The parser handles all of these per the CSV standard.
What delimiter should I use for European CSV files?
Enter a semicolon in the Delimiter box. Many European locales export semicolon-separated CSV because the comma is the decimal separator; the converter accepts any single-character delimiter.
Why did I get a “columns” error on a specific row?
With headers enabled, every data row must have the same number of columns as the header row. The error names the exact row — usually a missing delimiter or an unclosed quote is the culprit.