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TOML to JSON API#

The TOML to JSON API converts a TOML file to JSON format with a single request to POST /v1/convert/toml-to-json. Upload a .toml file via multipart form data and receive pretty-printed, 2-space-indented JSON directly, or set direct_download=false to get metadata with a presigned download URL. TOML datetime values are preserved as ISO-8601 strings.

Endpoint#

POST /v1/convert/toml-to-json

Content-Type: multipart/form-data

Accepted input: .toml 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_your_private_key

Or:

Authorization: Bearer <jwt_token>

Request Parameters#

Parameter	Type	Required	Default	Description
`file`	file	Yes	--	The `.toml` file to convert. Must be 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#

Direct mapping from TOML to JSON:

[database]
host = "localhost"
port = 5432

[database.credentials]
user = "admin"
password = "secret"

features = ["auth", "logging"]

Becomes:

{
  "database": {
    "host": "localhost",
    "port": 5432,
    "credentials": {
      "user": "admin",
      "password": "secret"
    }
  },
  "features": ["auth", "logging"]
}

TOML tables become JSON objects
TOML arrays become JSON arrays
TOML datetime values are serialized as ISO-8601 strings
Output is 2-space indented with unicode preserved

Response#

Direct Download (`direct_download=true`, default)#

HTTP 200 OK
Content-Type: application/json
Content-Disposition: inline; filename="config_20260405_123456789.json"

Metadata Response (`direct_download=false`)#

{
    "presigned_url": "https://spaces.example.com/...",
    "object_key": "env/files/{project_id}/toml-to-json/config_20260405_123456789.json",
    "filename": "config_20260405_123456789.json",
    "file_size": 1234,
    "conversion_time_seconds": 0.03
}

Code Examples#

Python#

import requests

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

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

Node.js#

const form = new FormData();
form.append("file", fs.createReadStream("config.toml"));

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

const json = await response.json();

PHP#

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

Go#

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

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

Error Responses#

Status	Condition
`400 Bad Request`	File is not a `.toml` file
`400 Bad Request`	Invalid TOML content
`400 Bad Request`	TOML to JSON conversion failed
`401 Unauthorized`	Missing or invalid API key / JWT token
`402 Payment Required`	Monthly ops allowance exhausted
`413 Payload Too Large`	File exceeds plan's maximum file size

Limits#

Limit	Value
Max file size	Plan-dependent (Founding: 5 MB)
Input encoding	UTF-8 only
Monthly conversions	Plan-dependent

Frequently asked questions#

How do I convert TOML to JSON with a REST API?#

Send a multipart/form-data POST request to POST /v1/convert/toml-to-json with your .toml file in the file field, authenticating with an X-API-Key header or a JWT Authorization: Bearer token. By default the response body is the raw JSON bytes.

How are TOML datetime values represented in the JSON output?#

TOML datetime values are serialized as ISO-8601 strings. TOML tables become JSON objects and TOML arrays become JSON arrays, with 2-space indentation and unicode preserved.

Can I get a presigned download URL instead of the raw JSON?#

Yes. Set direct_download=false and the API returns JSON metadata including a presigned_url, object_key, filename, file_size, and conversion_time_seconds.

Why does my TOML to JSON conversion return a 400 error?#

A 400 Bad Request is returned when the upload is not a .toml file, the TOML content is invalid, or the conversion itself fails. The file must also be UTF-8 encoded.

← json-to-toml csv-to-xml →

API Documentation