How to convert CSV to JSON
APIs speak JSON, spreadsheets speak CSV, and sooner or later every dataset has to cross that border. Paste the export, confirm the delimiter, and get structured records you can drop straight into code — no upload, no account.
Step by step
Open the CSV ↔ JSON converter
Start the free converter — it runs entirely on your device.
Paste your CSV
The first row must be the header row; the columns become the JSON property names.
Select the delimiter
Choose comma, semicolon, or tab to match how the file was exported.
Convert
Get an array of JSON objects — quoted fields with commas or line breaks inside are handled correctly.
Copy or download the JSON
Move the formatted records into your fixture, script, or API request.
Tips that save a second try
Blank headers are named column_N and duplicate headers get numeric suffixes — tidy the header row first for cleaner keys.
CSV cells stay strings; parse numbers, booleans, and dates in your own code where types matter.
The tool works both ways: paste an array of JSON objects to export a CSV for spreadsheet review.
Common questions
Can a CSV field contain commas or line breaks?
Yes, as long as the field is quoted. The parser follows the CSV rules for quoted fields and doubled quotes, so "Hello, world" stays one value.
Does the converter detect numbers and booleans?
No. It does not infer types, so every CSV cell becomes a JSON string. Convert the fields that need real types when you consume the data.