CSV to JSON Converter

Convert CSV to a JSON array, with header detection, quoted fields and number parsing.

How do you convert CSV to JSON?

Converting CSV to JSON reads each row of comma-separated values and turns it into a JSON object, using the header row as the property names, so spreadsheet data can be used in code and APIs.

Features

Delimiter detection — comma, semicolon, tab or pipe.
Proper CSV parsing — quoted fields, escaped double quotes ("") and line breaks inside quotes (RFC 4180).
Header row — use the first row as keys, or output arrays of values.
Typed values — numbers, true, false and null become real JSON types (numbers with leading zeros, such as ZIP codes, stay text).

Example

name,age
Ann,31

becomes [{"name": "Ann", "age": 31}].

Convert back with the JSON to CSV Converter.

Frequently asked questions

Can it handle commas inside values?

Yes, as long as the value is wrapped in double quotes, which is the CSV standard.

Why are some numbers kept as text?

Values with leading zeros (like 007 or ZIP codes) and very long numbers stay strings so no information is lost.

Is there a size limit?

Only your browser's memory; files of several megabytes convert in seconds.