---
category: Utilities
---

# useBase64

Reactive base64 transforming. Supports plain text, buffer, files, canvas, objects, maps, sets and images.

## Usage

```ts
import { useBase64 } from '@vueuse/core'
import { shallowRef } from 'vue'

const text = shallowRef('')

const { base64 } = useBase64(text)
```

If you use object, array, map or set you can provide serializer in options. Otherwise, your data will be serialized by default serializer.
Objects and arrays will be transformed in string by JSON.stringify. Map and set will be transformed in object and array respectively before stringify.

## Type Declarations

```ts
export interface UseBase64Options {
  /**
   * Output as Data URL format
   *
   * @default true
   */
  dataUrl?: boolean
}
export interface ToDataURLOptions extends UseBase64Options {
  /**
   * MIME type
   */
  type?: string | undefined
  /**
   * Image quality of jpeg or webp
   */
  quality?: any
}
export interface UseBase64ObjectOptions<T> extends UseBase64Options {
  serializer?: (v: T) => string
}
export interface UseBase64Return {
  base64: ShallowRef<string>
  promise: ShallowRef<Promise<string>>
  execute: () => Promise<string>
}
export declare function useBase64(
  target: MaybeRefOrGetter<string | undefined>,
  options?: UseBase64Options,
): UseBase64Return
export declare function useBase64(
  target: MaybeRefOrGetter<Blob | undefined>,
  options?: UseBase64Options,
): UseBase64Return
export declare function useBase64(
  target: MaybeRefOrGetter<ArrayBuffer | undefined>,
  options?: UseBase64Options,
): UseBase64Return
export declare function useBase64(
  target: MaybeRefOrGetter<HTMLCanvasElement | undefined>,
  options?: ToDataURLOptions,
): UseBase64Return
export declare function useBase64(
  target: MaybeRefOrGetter<HTMLImageElement | undefined>,
  options?: ToDataURLOptions,
): UseBase64Return
export declare function useBase64<T extends Record<string, unknown>>(
  target: MaybeRefOrGetter<T>,
  options?: UseBase64ObjectOptions<T>,
): UseBase64Return
export declare function useBase64<T extends Map<string, unknown>>(
  target: MaybeRefOrGetter<T>,
  options?: UseBase64ObjectOptions<T>,
): UseBase64Return
export declare function useBase64<T extends Set<unknown>>(
  target: MaybeRefOrGetter<T>,
  options?: UseBase64ObjectOptions<T>,
): UseBase64Return
export declare function useBase64<T>(
  target: MaybeRefOrGetter<T[]>,
  options?: UseBase64ObjectOptions<T[]>,
): UseBase64Return
```