WebP to SVG API#

Convert WebP to SVG with the POST /v1/convert/webp-to-svg endpoint, which embeds a WebP image inside an SVG wrapper. The WebP is first decoded to PNG, then base64-encoded and placed as a data URI inside an SVG <image> element. This is not vectorization. Responses return the raw SVG bytes by default, or JSON metadata with a presigned download URL when direct_download=false.

Endpoint#

POST /v1/convert/webp-to-svg

Content-Type: multipart/form-data

Accepted input: .webp 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 WebP is first decoded to PNG using Pillow, then base64-encoded and embedded inside an SVG <image> element
• The SVG dimensions and viewBox match the original image's pixel dimensions
• Transparency is preserved in the embedded PNG 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}/webp-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.webp", "rb") as f:
    response = requests.post(
        "https://api.enconvert.com/v1/convert/webp-to-svg",
        headers={"X-API-Key": "sk_your_private_key"},
        files={"file": ("image.webp", 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.webp"));

const response = await fetch("https://api.enconvert.com/v1/convert/webp-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#

$ch = curl_init("https://api.enconvert.com/v1/convert/webp-to-svg");
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["X-API-Key: sk_your_private_key"],
    CURLOPT_POSTFIELDS => ["file" => new CURLFile("image.webp")]
]);
$output = curl_exec($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.webp")
file, _ := os.Open("image.webp")
io.Copy(part, file)
writer.Close()

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

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

Send a multipart/form-data POST request to /v1/convert/webp-to-svg with the .webp file in the file field, authenticated via X-API-Key or a Bearer JWT. You get the SVG bytes back directly, or set direct_download=false for JSON with a presigned download URL.

Does WebP to SVG conversion vectorize the image?#

No. The endpoint decodes the WebP to PNG with Pillow, then base64-encodes it as a data URI inside an SVG <image> element. The output contains the full raster image data, not traced vector paths.

Is transparency preserved when converting WebP to SVG?#

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

Why does the WebP to SVG endpoint return a 400 error?#

400 Bad Request is returned when the uploaded file is not a .webp file, or when the conversion fails because the file is corrupt or unsupported.