CSV to JSON: How to Convert Tabular Data in Pure JavaScript (No Libraries)

CSV is everywhere — spreadsheets, data exports, API responses that somehow still use it. JSON is what your code actually wants. Here's how to convert between them in pure JavaScript, without installing anything. Why CSV to JSON matters CSV (comma-separated values) is simple and universal. JSON is structured and directly usable in JavaScript. The conversion problem shows up constantly: You export user data from a CRM as CSV and need to POST it to an API You get a data dump from a client as a spre