# PDFExporter.uploadTo()

```ts
uploadTo(url: string, options?: UploadOptions): Promise<Response>
```

Upload the exported PDF (e.g. to an S3 presigned URL). Sends `Content-Type: application/pdf` unless `headers` overrides it. Needs `export`.

- Kind: method
- Since: 1.0.0

| Parameter | Type | Description |
| --- | --- | --- |
| `url` | `string` | Where to send the file, e.g. an S3 presigned URL. |
| `options?` | `UploadOptions` | Every `ExportOptions` field, and the request's `method` (default `'PUT'`), `headers` (`Content-Type: application/pdf` is sent unless these name one, in any case) and `credentials` (`fetch`'s; `same-origin` by default, `include` for a cookie-authenticated endpoint on another origin). The `signal` cancels the upload too. |

Returns `Promise<Response>`: The `fetch` `Response`. Does **not** reject on an HTTP error status — check `response.ok`.

Throws:

- `NETWORK_ERROR` when the request could not be sent at all (the address, the network, or a CORS refusal: the response must allow your origin).
- `ABORTED` when `signal` aborts, during the export or the upload.
- `FEATURE_NOT_LICENSED` when the license lacks `export`.
- `INVALID_ARGUMENT` when `pages` is empty or names a page the document does not have, or when `headers` holds a name or value a request cannot carry.
- `INVALID_STATE` when `flatten` is asked of a signed document without `invalidateSignatures`; from a viewer's exporter, when pending edits cannot be written or the document was reloaded under it.
- `PAGE_ERROR` when a page cannot be loaded for flattening.
- `EXPORT_FAILED` when the document cannot be written.
- `DOCUMENT_CLOSED` after `doc.close()`.

```ts
const { url } = await (await fetch('/api/presign')).json();
const response = await viewer.createExporter().uploadTo(url, { method: 'PUT' });
if (!response.ok) showUploadFailed(response.status);
```

Part of [PDFExporter](https://kernstra.com/docs/web-sdk/api/pdfexporter) in the Kernstra Web SDK 1.0.0 API reference.

Web page: https://kernstra.com/docs/web-sdk/api/pdfexporter/uploadto