SnapOtter/apps/docs/tools/image/svg-to-raster.md

---
description: Convert SVG files to PNG, JPEG, WebP, AVIF, TIFF, GIF, HEIF, or JXL at custom resolution and DPI, with batch support.
---

# SVG to Raster {#svg-to-raster}

Convert SVG files to raster image formats (PNG, JPEG, WebP, AVIF, TIFF, GIF, HEIF, or JXL) at custom resolution and DPI. Also supports batch conversion of multiple SVGs.

## API Endpoint {#api-endpoint}

`POST /api/v1/tools/image/svg-to-raster`

## Parameters {#parameters}

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| width | integer | No | - | Target width in pixels (1 to 65536). Maintains aspect ratio if only one dimension set. |
| height | integer | No | - | Target height in pixels (1 to 65536). Maintains aspect ratio if only one dimension set. |
| dpi | integer | No | 300 | Render DPI, controls the base rasterization density (36 to 2400) |
| quality | number | No | 90 | Output quality for lossy formats (1 to 100) |
| backgroundColor | string | No | `"#00000000"` | Background color as hex (6 or 8 characters, 8-char includes alpha) |
| outputFormat | string | No | `"png"` | Output format: `png`, `jpg`, `webp`, `avif`, `tiff`, `gif`, `heif`, `jxl` |

## Example Request {#example-request}

```bash
curl -X POST http://localhost:1349/api/v1/tools/image/svg-to-raster \
  -F "file=@logo.svg" \
  -F 'settings={"width":1024,"dpi":300,"outputFormat":"png","backgroundColor":"#FFFFFF"}'
```

## Example Response {#example-response}

```json
{
  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/logo.png",
  "previewUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/preview.webp",
  "originalSize": 12345,
  "processedSize": 67890
}
```

## Batch Endpoint {#batch-endpoint}

`POST /api/v1/tools/image/svg-to-raster/batch`

Convert multiple SVG files in one request. Returns a ZIP archive.

### Additional Batch Parameters {#additional-batch-parameters}

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| clientJobId | string | No | - | Optional client-provided job ID for progress tracking (max 128 chars) |

### Batch Example Request {#batch-example-request}

```bash
curl -X POST http://localhost:1349/api/v1/tools/image/svg-to-raster/batch \
  -F "file=@icon1.svg" \
  -F "file=@icon2.svg" \
  -F "file=@icon3.svg" \
  -F 'settings={"width":512,"outputFormat":"png","dpi":150}'
```

### Batch Response {#batch-response}

The batch endpoint streams a ZIP file directly with headers:
- `Content-Type: application/zip`
- `X-Job-Id: <jobId>`
- `X-File-Results: <url-encoded JSON mapping of index to filename>`

## Notes {#notes}

- Only accepts SVG and SVGZ files (validates content, not just extension). SVGZ is automatically decompressed.
- SVG content is sanitized before rendering to prevent XSS and external resource loading.
- The `dpi` setting controls the density at which the SVG is rasterized. Higher DPI produces larger pixel dimensions from the same SVG viewport.
- When both `width` and `height` are provided, the image is resized using `fit: inside` (maintains aspect ratio within the bounds).
- A `previewUrl` is included in the response for formats that browsers cannot display natively (TIFF, HEIF). The preview is a 1200px WebP thumbnail.
- The default background `#00000000` is fully transparent. Set to `#FFFFFF` for a white background (useful with JPEG output which does not support transparency).
- Batch processing respects the `MAX_BATCH_SIZE` server configuration and uses concurrent workers for performance.
- Progress for batch operations can be tracked via SSE at `/api/v1/jobs/:jobId/progress`.