Does it handle quoted fields and commas inside values?

It does. The parser respects RFC 4180 style double-quoted fields, including escaped double quotes and commas or line breaks inside a value.

What happens if my CSV has no header row?

Untick “First row is header” and the output becomes a JSON array of arrays, preserving the exact row and column order of the source file.

Developer Tools

CSV to JSON Converter

Paste raw CSV or upload a .csv file to get a clean, formatted JSON array you can copy or download in one click.

Delimiter

First row is headerUpload .csv

CSV input

JSON output

[
  {
    "name": "Ada",
    "role": "Engineer",
    "city": "London"
  },
  {
    "name": "Grace",
    "role": "Admiral",
    "city": "New York"
  }
]

100% private

This tool runs entirely in your browser. Nothing you type is uploaded, logged or stored.

Structured Data Conversion and API Integration Handling

CSV is the lowest common denominator of data export: spreadsheets, ad platforms, CRMs and database dumps all speak it. JSON is what APIs, JavaScript applications and NoSQL stores expect. Converting between the two is the first step in almost every integration, migration or bulk-import job, and getting it wrong quietly corrupts data downstream.

The safe conversion path treats the first row as a key set, trims whitespace from header names, and preserves quoted fields that contain commas, line breaks or escaped double quotes. Choose the right delimiter — European exports frequently use semicolons, and database dumps often use tabs — because a mismatched delimiter collapses every record into a single field. Once converted, validate the JSON before posting it to an endpoint: check that numeric columns are not accidentally quoted, that empty cells become empty strings rather than undefined, and that key names match the exact casing your API contract requires. This converter runs entirely in your browser, so customer lists and internal exports never leave your device.

Frequently asked questions

Yes. Use the upload button to load a local .csv file — it is read in the browser with the File API and never transmitted to a server.