> For the complete documentation index, see [llms.txt](https://developers-apps-in-toss.toss.im/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers-apps-in-toss.toss.im/documentation/sdk/domains-api/file/file.savebase64.md).

# File.saveBase64

> 함수형 API `saveBase64Data`로도 같은 기능을 쓸 수 있어요.

### 기능 설명

Base64로 인코딩된 데이터를 지정한 파일 이름과 MIME 타입으로 사용자 기기에 저장해요. 이미지, 텍스트, PDF 등 다양한 형식을 저장할 수 있어요. `fileName`에는 확장자를 포함해야 해요.

토스앱 Android `5.218.0`, iOS `5.216.0` 이상에서 사용할 수 있어요.

### 타입

```ts
File.saveBase64(params: SaveBase64DataParams): Promise<void>;
```

**Params**

```ts
type SaveBase64DataParams = {
  data: string;
  fileName: string;
  mimeType: string;
};
```

**Response**

반환값이 없어요.

### 예시 코드

```js
import { File } from "@apps-in-toss/web-framework";

async function handleSave() {
  try {
    await File.saveBase64({
      data: "iVBORw0KGgo...",
      fileName: "some-photo.png",
      mimeType: "image/png",
    });
  } catch (error) {
    console.error("데이터 저장에 실패했어요:", error);
  }
}

document.querySelector("#save-file").addEventListener("click", handleSave);
```


---

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