CSV to JSON Converter turns comma-separated spreadsheet data into a structured JSON array of objects. The first row of your CSV becomes the property keys, and each subsequent row becomes one object in the array. Use it to import Excel exports into REST APIs, seed databases from spreadsheet data, or prepare tabular data for JavaScript applications.
The converter reads the first CSV row to extract column headers, which become the property keys in each JSON object. It then reads each subsequent row and maps cell values to their corresponding key. Values in the JSON output are always strings because CSV has no type information — numbers, dates, and booleans remain as quoted strings until your application parses them.
Yes. The converter treats the first row as the key names for all JSON objects. If your CSV does not have headers, add them manually before converting — the output keys will match whatever text is in the first row.
CSV is plain text with no type information, so all values are read as strings. If you need numbers or booleans in your JSON, you will need to parse and cast the values in your application after receiving the array. Most JSON parsers and languages make this straightforward.
Standard CSV encloses values that contain commas in double quotes (per RFC 4180). The converter correctly handles quoted fields so a value like "London, UK" produces the string "London, UK" in the JSON — the internal comma is not treated as a separator.
No. CSV is a flat format with no nesting, so the output is always a flat array of objects. Each property in the JSON object corresponds to one CSV column. If you need nested JSON, you would need to restructure the output manually after conversion.
No. The conversion runs entirely in your browser using JavaScript. Your spreadsheet data never leaves your device, which makes this safe to use with employee lists, customer records, or other sensitive information.
Yes, completely free with no account, no upload limits, and no watermarks on the output.
Tool workspace
Free CSV to JSON converter. Paste spreadsheet data and get a structured JSON array ready for APIs, databases, or JavaScript applications. No login required.
Input
Output
Input
id,status 1,active
Output
[
{
"id": "1",
"status": "active"
}
]