How do I convert CSV to JSON?

Paste your CSV into the converter on this page and pick JSON as the output. Conversion happens instantly in your browser — nothing is uploaded. You can also call the free API: POST /api/v1/convert with { from: "csv", to: "json", data }.

Is the CSV to JSON converter free?

Yes. The on-page CSV-to-JSON converter is free and runs locally in your browser. The developer API is also free during beta, with a per-call paid tier for bulk and large payloads.

Convert CSV to JSON

Paste your Comma-Separated Values (CSV) and convert it to JavaScript Object Notation (JSON) in one click. Runs entirely in your browser — no upload, no signup.

Input (CSV)

id,name,role,active
1,Ada Lovelace,Engineer,true
2,Alan Turing,Researcher,false

Output (JSON)

Convert this via the API (curl)

curl -X POST "https://data.wrapper-agency.com/api/v1/convert" \
  -H "Content-Type: application/json" \
  -d '{"from":"csv","to":"json","data":"id,name,role,active\n1,Ada Lovelace,Engineer,true\n2,Alan Turing,Researcher,false"}'

Free conversion API — no key during beta. POST { from, to, data }, get back the converted string. All conversion runs server-side; nothing is stored.

CSV vs JSON

CSV

A flat, tabular text format. The lingua franca of spreadsheets, exports, and data dumps.

JSON

A lightweight, human-readable data-interchange format. The default for web APIs and config.

How to convert CSV to JSON

FormatForge parses your CSV into an in-memory data structure, then serializes it as JSON. Numbers, booleans, and null values are preserved, and nested structures are mapped to JSON's native shape.

Example

CSV in

id,name,role,active
1,Ada Lovelace,Engineer,true
2,Alan Turing,Researcher,false

JSON out

[
  {
    "id": 1,
    "name": "Ada Lovelace",
    "role": "Engineer",
    "active": true
  },
  {
    "id": 2,
    "name": "Alan Turing",
    "role": "Researcher",
    "active": false
  }
]

Convert CSV to JSON in code

Send the conversion to the free API and get the result back as a string:

curl -X POST "https://data.wrapper-agency.com/api/v1/convert" \
  -H "Content-Type: application/json" \
  -d '{"from":"csv","to":"json","data":"...your CSV as a string..."}'

Full reference: the conversion API. For bulk or very large payloads, see the paid bulk endpoint.

FAQ

Does converting CSV to JSON change my data?: No — the conversion is structural. Your values are preserved; only the serialization format changes.
Is my data uploaded anywhere?: The on-page converter runs locally in your browser. The API processes your payload server-side and stores nothing.

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