csv-to-json

Convert a CSV file to JSON format. The first row is used as column headers. Each subsequent row becomes a JSON object in the output array.

Endpoint

POST /v1/convert/csv-to-json

Content-Type: multipart/form-data

Accepted input: .csv files (UTF-8 encoded)

Output format: .json (application/json)

Authentication

Requires either a private API key or a JWT token from a public key.

X-API-Key: sk_live_your_private_key

Or:

Authorization: Bearer <jwt_token>

Request Parameters

Parameter	Type	Required	Default	Description
`file`	file	Yes	--	The `.csv` file to convert. First row must be column headers. UTF-8 encoded.
`output_filename`	`string`	No	Input filename	Custom output filename. The `.json` extension is added automatically.
`direct_download`	`boolean`	No	`true`	When `true`, returns raw JSON bytes. When `false`, returns metadata with a presigned download URL.

Conversion Rules

name,age,city
Alice,30,London
Bob,25,Paris

Becomes:

[
  {"name": "Alice", "age": "30", "city": "London"},
  {"name": "Bob", "age": "25", "city": "Paris"}
]

First row is treated as column headers
Delimiter is comma (not configurable)
All values remain as strings in the JSON output -- no type inference is performed. The number 30 in CSV becomes "30" in JSON, not 30.
Output is pretty-printed JSON with 2-space indentation

Response

Direct Download (`direct_download=true`, default)

HTTP 200 OK
Content-Type: application/json
Content-Disposition: inline; filename="data_20260405_123456789.json"

Metadata Response (`direct_download=false`)

{
    "presigned_url": "https://spaces.example.com/...",
    "object_key": "env/files/{project_id}/csv-to-json/data_20260405_123456789.json",
    "filename": "data_20260405_123456789.json",
    "file_size": 1234,
    "conversion_time_seconds": 0.03
}

Code Examples

Python

import requests

with open("data.csv", "rb") as f:
    response = requests.post(
        "https://api.enconvert.com/v1/convert/csv-to-json",
        headers={"X-API-Key": "sk_live_your_private_key"},
        files={"file": ("data.csv", f, "text/csv")}
    )

with open("data.json", "wb") as out:
    out.write(response.content)

Node.js

const form = new FormData();
form.append("file", fs.createReadStream("data.csv"));

const response = await fetch("https://api.enconvert.com/v1/convert/csv-to-json", {
    method: "POST",
    headers: { "X-API-Key": "sk_live_your_private_key" },
    body: form
});

const json = await response.json();

PHP

$ch = curl_init("https://api.enconvert.com/v1/convert/csv-to-json");
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["X-API-Key: sk_live_your_private_key"],
    CURLOPT_POSTFIELDS => ["file" => new CURLFile("data.csv", "text/csv")]
]);
$json = curl_exec($ch);
curl_close($ch);

Go

body := &bytes.Buffer{}
writer := multipart.NewWriter(body)
part, _ := writer.CreateFormFile("file", "data.csv")
file, _ := os.Open("data.csv")
io.Copy(part, file)
writer.Close()

req, _ := http.NewRequest("POST", "https://api.enconvert.com/v1/convert/csv-to-json", body)
req.Header.Set("Content-Type", writer.FormDataContentType())
req.Header.Set("X-API-Key", "sk_live_your_private_key")
resp, _ := http.DefaultClient.Do(req)

Error Responses

Status	Condition
`400 Bad Request`	File is not a `.csv` file
`400 Bad Request`	CSV file is empty or has no valid rows
`400 Bad Request`	Invalid CSV encoding (expected UTF-8)
`401 Unauthorized`	Missing or invalid API key / JWT token
`402 Payment Required`	Monthly conversion limit reached
`413 Payload Too Large`	File exceeds plan's maximum file size

Limits

Limit	Value
Max file size	Plan-dependent (Free: 5 MB)
Input encoding	UTF-8 only
Type inference	None (all values are strings)
Monthly conversions	Plan-dependent

API Documentation Beta