json-to-csv

Convert a JSON file to CSV format. The input must be a JSON array of objects. Column headers are derived from the keys of the first object.

Endpoint

POST /v1/convert/json-to-csv

Content-Type: multipart/form-data

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

Output format: .csv (text/csv)

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

Conversion Rules

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

Becomes:

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

• Input must be a JSON array of objects (list of dictionaries)
• Column headers are derived from the first object's keys only
• Delimiter is comma (not configurable)
• Quoting follows QUOTE_MINIMAL -- values containing commas, quotes, or newlines are quoted
• Nested objects or arrays in values are serialized as their string representation (not flattened)

Response

Direct Download (direct_download=true, default)

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

Metadata Response (direct_download=false)

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

Code Examples

Python

import requests

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

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

Node.js

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

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

const csv = await response.text();

PHP

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

Go

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

req, _ := http.NewRequest("POST", "https://api.enconvert.com/v1/convert/json-to-csv", 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

Limits