PNG to SVG API#

The PNG to SVG API embeds a PNG image inside an SVG wrapper with a single request to POST /v1/convert/png-to-svg. The PNG data is base64-encoded and placed as a data URI inside an SVG <image> element, with the SVG dimensions and viewBox matching the original image's pixel dimensions. This is not vectorization. The output is a raster image wrapped in SVG. Responses return the SVG bytes directly, or JSON metadata with a presigned download URL when direct_download=false.

Endpoint#

POST /v1/convert/png-to-svg

Content-Type: multipart/form-data

Accepted input: .png files

Output format: .svg (image/svg+xml)

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#

Conversion Details#

• The PNG is base64-encoded and embedded inside an SVG <image> element as a data URI
• The SVG dimensions and viewBox match the original image's pixel dimensions
• Transparency in the PNG is preserved in the embedded data
• This is NOT vectorization -- the output contains the full raster image data, not vector paths

Response#

Direct Download (direct_download=true, default)#

HTTP 200 OK
Content-Type: image/svg+xml
Content-Disposition: inline; filename="image_20260405_123456789.svg"

Returns raw image bytes.

Metadata Response (direct_download=false)#

{
    "presigned_url": "https://spaces.example.com/...",
    "object_key": "env/files/{project_id}/png-to-svg/image_20260405_123456789.svg",
    "filename": "image_20260405_123456789.svg",
    "file_size": 45678,
    "conversion_time_seconds": 0.5
}

Code Examples#

Python#

import requests

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

with open("image_20260405_123456789.svg", "wb") as out:
    out.write(response.content)

Node.js#

const form = new FormData();
form.append("file", fs.createReadStream("image.png"));

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

fs.writeFileSync("image_20260405_123456789.svg", Buffer.from(await response.arrayBuffer()));

PHP#

$ch = curl_init("https://api.enconvert.com/v1/convert/png-to-svg");
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["X-API-Key: sk_your_private_key"],
    CURLOPT_POSTFIELDS => ["file" => new CURLFile("image.png")]
]);
$output = curl_exec($ch);
curl_close($ch);
file_put_contents("image_20260405_123456789.svg", $output);

Go#

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

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

Limits#

Frequently asked questions#

Does the PNG to SVG API vectorize my image?#

No. This endpoint embeds the raster PNG inside an SVG container as a base64 data URI in an SVG <image> element. It does not trace or convert the image to vector paths.

Why is my SVG output file larger than the input PNG?#

The PNG is base64-encoded when embedded in the SVG, which adds roughly 33% overhead, so the output file is larger than the input.

Is PNG transparency preserved when embedding into SVG?#

Yes. Transparency in the PNG is preserved in the embedded data, and the SVG dimensions and viewBox match the original image's pixel dimensions.

How do I convert PNG to SVG with a REST API?#

Send a POST request to /v1/convert/png-to-svg with your .png file as multipart/form-data, authenticated via X-API-Key or a JWT Authorization: Bearer token. You get the SVG bytes back, or a presigned_url in JSON when direct_download=false.

Why does the API return 400 Bad Request?#

A 400 Bad Request means the uploaded file is not a .png file, or the image conversion failed because the file is corrupt or unsupported.